Language Teaching Research最新文献

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Exploring the silence of Japanese EFL learners: Its relationship with the degree of willingness to communicate (WTC) 探索日本 EFL 学习者的沉默:沉默与交流意愿(WTC)的关系
IF 4.2 1区 文学
Language Teaching Research Pub Date : 2024-11-14 DOI: 10.1177/13621688241291932
Rintaro Sato
{"title":"Exploring the silence of Japanese EFL learners: Its relationship with the degree of willingness to communicate (WTC)","authors":"Rintaro Sato","doi":"10.1177/13621688241291932","DOIUrl":"https://doi.org/10.1177/13621688241291932","url":null,"abstract":"The concept of willingness to communicate (WTC) is pivotal in understanding student engagement in English as a foreign language (EFL) classrooms. As a dynamic and multifaceted construct, WTC is subject to continual fluctuations throughout the communication process, often changing situationally. Traditionally, learner silence in class or during second language (L2) conversations is perceived negatively, as it can signal a lack of motivation to speak, thereby impeding optimal language acquisition. However, silence can also function as a communicative strategy or reflect learners’ essential feelings and emotions. This study explored the relationship between Japanese EFL learners’ situational WTC and their instances of silence during L2 (English) conversations. Participants were recruited for the study and were asked to deliver short speeches and engage in conversations with a researcher, during which their periods of silence were observed and recorded. All participant utterances were meticulously transcribed and analysed. Additionally, participants self-assessed their WTC for each utterance, and a stimulated recall interview was conducted to gather in-depth qualitative data. The results generally indicated that participants’ WTC was somewhat decreased when silence occurred between and during utterances. However, the findings also revealed the intricate and multifaceted nature of silence in relation to WTC, underscoring the need for a deeper understanding and nuanced consideration of learners’ silence. This study highlights the complexity of the interplay between WTC and silence, suggesting that silence should not be solely viewed as a negative phenomenon but rather as an integral part of the communicative process that warrants careful analysis and understanding.","PeriodicalId":47852,"journal":{"name":"Language Teaching Research","volume":"63 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142610723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"文学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
What puzzles L2 learners about German grammar? Using practitioner research to explore threshold concepts in language curricula 第二语言学习者对德语语法的困惑是什么?利用实践研究探索语言课程中的门槛概念
IF 4.2 1区 文学
Language Teaching Research Pub Date : 2024-11-08 DOI: 10.1177/13621688241290496
Cori Crane
{"title":"What puzzles L2 learners about German grammar? Using practitioner research to explore threshold concepts in language curricula","authors":"Cori Crane","doi":"10.1177/13621688241290496","DOIUrl":"https://doi.org/10.1177/13621688241290496","url":null,"abstract":"Taking the perspective of a language program director (LPD), this practitioner research (PR) study describes how analysis of learners’ reflections written for an advanced undergraduate German course in the United States helped an LPD see how students had experienced learning grammar in lower-level instruction. The study analyses a semester-long project based on the PR framework of exploratory practice (EP), in which students ( n = 30) pursued individual questions (‘puzzles’) about German grammar that would be most meaningful to them in their language learning journey. Initial analysis of the students’ questions revealed a general preference among learners to investigate grammar topics previously covered in the lower-division curriculum. In-depth case studies, focused on two learners’ experiences with EP, show how the project allowed students to investigate their grammar puzzles using resources across the entire curriculum, including dialoguing with teachers and students in other courses. The study looks to threshold concept theory to theorize students’ learning experiences vis-à-vis L2 grammar (specifically inflectional morphology, i.e. case markings) and argues that the flexibility of the EP framework and its core tenets of working towards understanding and involving others supported the LPD in seeing how learners understood and felt about German grammar and grammar instruction across the larger curriculum.","PeriodicalId":47852,"journal":{"name":"Language Teaching Research","volume":"1 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"文学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring beliefs, motivations and emotions: Insights from learning Maltese as a second language 探索信念、动机和情感:将马耳他语作为第二语言学习的启示
IF 4.2 1区 文学
Language Teaching Research Pub Date : 2024-10-30 DOI: 10.1177/13621688241289724
Lawrence Farrugia Caruana, Jacqueline Żammit
{"title":"Exploring beliefs, motivations and emotions: Insights from learning Maltese as a second language","authors":"Lawrence Farrugia Caruana, Jacqueline Żammit","doi":"10.1177/13621688241289724","DOIUrl":"https://doi.org/10.1177/13621688241289724","url":null,"abstract":"Second language acquisition is a complex process that involves numerous challenges and is influenced by various factors, including linguistic competence and classroom settings. This study examines the concerns and emotions experienced by 43 adult international students learning Maltese as a second language. By employing a mixed-methods approach, the research collected both qualitative and quantitative data through questionnaires and interviews. The results reveal a spectrum of positive and negative emotions experienced by students during a Maltese language learning session that incorporated digital resources. The evidence presented in this research shows that students have both personal and practical goals concerning second language acquisition. The use of non-traditional technological interventions aligned with the learners’ beliefs and motivations, makes the learning process more effective, particularly by eliciting positive emotions. This study underscores the importance of addressing students’ concerns and emotions in second language acquisition and the benefits of integrating technology into language learning. Pedagogically, this study advocates for a nuanced approach to address learners’ emotional concerns, emphasizing the imperative for language instructors to be trained in emotion regulation strategies to help students manage their emotions during the learning process. Moreover, integrating cultural components into language pedagogy can serve as a compass, guiding students through social norms and intricacies, thereby fostering a sense of belonging within the local community. Furthermore, the study highlights the pedagogical merit of immediate feedback mechanisms and the implementation of diverse, inclusive teaching methods and resources tailored to accommodate various learning styles and paces. These pedagogical implications advocate for a holistic and adaptive language teaching paradigm, aiming to foster a more inclusive and emotionally supportive learning environment for international students.","PeriodicalId":47852,"journal":{"name":"Language Teaching Research","volume":"16 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"文学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
What factors contribute to the proficiency of young EFL learners in primary school? Assessing the role of CLIL intensity, extramural English, non-verbal intelligence and socioeconomic status 哪些因素有助于提高小学低年级英语学习者的英语水平?评估CLIL强度、校外英语、非语言智能和社会经济地位的作用
IF 4.2 1区 文学
Language Teaching Research Pub Date : 2024-10-30 DOI: 10.1177/13621688241292277
Amparo Lázaro-Ibarrola
{"title":"What factors contribute to the proficiency of young EFL learners in primary school? Assessing the role of CLIL intensity, extramural English, non-verbal intelligence and socioeconomic status","authors":"Amparo Lázaro-Ibarrola","doi":"10.1177/13621688241292277","DOIUrl":"https://doi.org/10.1177/13621688241292277","url":null,"abstract":"Although multiple factors influence language proficiency in instructed settings, the prevalence of content and language integrated learning (CLIL) research in recent decades has placed intensity of exposure (via CLIL lessons) at center stage, sidelining other variables. This study aims to rectify this by examining the impact of CLIL alongside three additional factors: extramural English (EE), socioeconomic status (SES), and non-verbal intelligence (NVI). Specifically, this study analyses the interplay of these variables in the proficiency of 171 young English learners (aged 10–11 years) in Navarre, Spain. The participants were divided into a low-intensity (LI) ( n = 54) group and a high-intensity (HI) ( n = 117) group depending on exposure to English in school. Results indicate that HI learners are superior in reading, and even more clearly in speaking. EE is very frequent in both groups but more abundant among HI learners, and it shows several positive associations with learners’ scores. Higher NVI levels positively correlate with all skills in both groups, except for speaking, which appears to be affected by EE and, to a lesser extent, by SES.","PeriodicalId":47852,"journal":{"name":"Language Teaching Research","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"文学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Model texts as a feedback instrument in second language writing: A systematic review 范文作为第二语言写作的反馈工具:系统回顾
IF 4.2 1区 文学
Language Teaching Research Pub Date : 2024-10-25 DOI: 10.1177/13621688241291336
Long Quoc Nguyen, Phung Dao, Bao Trang Thi Nguyen
{"title":"Model texts as a feedback instrument in second language writing: A systematic review","authors":"Long Quoc Nguyen, Phung Dao, Bao Trang Thi Nguyen","doi":"10.1177/13621688241291336","DOIUrl":"https://doi.org/10.1177/13621688241291336","url":null,"abstract":"The potential of model texts as a feedback instrument (MTFI) in second language (L2) writing has been explored for about two decades and continues to receive increasing interest from L2 scholars. However, to date, there is still an absence of a comprehensive review of studies in this particular area. Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) procedure, this study aims to fill this gap by systematically reviewing 25 empirical studies on MTFI dating up to 1 April 2023, specifically focusing on three main aspects: study contexts, methodological characteristics, and primary areas of focus and key findings. The results revealed that existing MTFI studies (1) largely targeted low-intermediate English as a foreign language (EFL) learners at primary schools, (2) primarily adopted a quasi-experimental design involving a three-stage narrative writing task in a classroom-based setting, (3) predominantly focused on writing as a process, and (4) consistently reported MTFI’s potential for promoting L2 writing gains, especially in terms of lexical aspects. These results not only further our understanding about the effect of MTFI on different dimensions of task performance and L2 learning (i.e. L2 writing), but also provide some pedagogical implications for practices. Suggestions for addressing methodological issues in future studies are provided to advance this research domain.","PeriodicalId":47852,"journal":{"name":"Language Teaching Research","volume":"61 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142490880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"文学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
L2 anxiety, proficiency, and communication across the classroom, non-classroom, and digital settings: Insights from Ethiopian preparatory schools 课堂、非课堂和数字环境中的 L2 焦虑、熟练程度和交流:埃塞俄比亚预备学校的启示
IF 4.2 1区 文学
Language Teaching Research Pub Date : 2024-10-23 DOI: 10.1177/13621688241288792
Merih Welay Welesilassie, Marianne Nikolov
{"title":"L2 anxiety, proficiency, and communication across the classroom, non-classroom, and digital settings: Insights from Ethiopian preparatory schools","authors":"Merih Welay Welesilassie, Marianne Nikolov","doi":"10.1177/13621688241288792","DOIUrl":"https://doi.org/10.1177/13621688241288792","url":null,"abstract":"Research into second or foreign language (L2) learning has demonstrated that L2 anxiety, perceived proficiency, and L2 willingness to communicate (L2WTC) profoundly impact language learning outcomes. However, the complex interplay between these variables has yet to be fully explored, as these factors are dynamic and context-specific and can vary across different learners and learning environments. The study, therefore, utilized a cross-sectional quantitative survey research design to scrutinize the causal relationships between L2 anxiety, English proficiency, and L2WTC of 609 Ethiopian preparatory school students. The model for the L2WTC, both inside and outside the classroom, has been expanded to include an additional sub-scale known as the L2WTC in a digital setting. Moreover, in contrast to the commonly recognized debilitative-focused L2 anxiety, the construct of L2 anxiety has been divided into facilitative and debilitative anxiety. This method allows us to measure not only the presence or absence of anxiety but also evaluate if anxiety helps or hinders the L2 learning experience. A self-assessment proficiency measure was also developed specifically for Ethiopian high school students. The study treated facilitative and debilitative anxiety as independent variables while considering English proficiency and L2WTC in the classroom, outside the classroom, and in digital settings as dependent variables. English proficiency was also used as an independent variable to predict L2WTC in these three settings. Our proposed model, including these variables, was tested using structural equation modelling (SEM). According to the descriptive analysis, the mean scores of L2WTC in the three settings were generally low, ranging from 2.30 to 2.84. Debilitative anxiety casts a shadow on the positive aspects of anxiety. The English proficiency was also too low. According to SEM, debilitative anxiety displayed a statistically significant negative impact on L2WTC inside and outside the classroom, in digital settings, and English proficiency. In contrast, facilitative anxiety was found to positively contribute to L2WTC outside the classroom, in digital settings, and in English proficiency. English proficiency made a statistically significant and positive contribution to L2WTC within and outside the classroom and in digital contexts. L2WTC inside the classroom positively contributed to L2WTC outside the classrooms and in digital contexts. We systematically compared the findings with existing studies in the discussion and elucidated the pedagogical implications, limitations, and potential future research avenues. The outcomes of our study have the potential to significantly contribute to the advancement of theoretical and empirical knowledge about improving English education, learning, and communication not only in Ethiopia but also in similar contexts of English as a foreign language (EFL).","PeriodicalId":47852,"journal":{"name":"Language Teaching Research","volume":"58 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142488657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"文学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interactions between task complexity, task repetition, and task motivation in L2 writing 第二语言写作中任务复杂性、任务重复性和任务动机之间的相互作用
IF 4.2 1区 文学
Language Teaching Research Pub Date : 2024-10-22 DOI: 10.1177/13621688241286661
Mahmoud Abdi Tabari, Phil Hiver, Reza Norouzian
{"title":"Interactions between task complexity, task repetition, and task motivation in L2 writing","authors":"Mahmoud Abdi Tabari, Phil Hiver, Reza Norouzian","doi":"10.1177/13621688241286661","DOIUrl":"https://doi.org/10.1177/13621688241286661","url":null,"abstract":"This study explores the interplay between task repetition and task motivation in second language (L2) writing, specifically focusing on syntactic complexity, accuracy, and lexical complexity (CAL). Aligning with Dörnyei’s call to balance cognitive and affective factors in task-based language teaching (TBLT), the research involved 100 advanced mid-level learners of English as a second language (ESL) aged between 18 and 20 years. Participants completed both simple and complex argumentative writing tasks in a counterbalanced order, with a one-week interval between tasks. A perception questionnaire was administered immediately after each task performance to validate cognitive task complexity manipulations. Subsequently, participants repeated the same tasks with the same time interval, complemented by the completion of a task motivation questionnaire after each task. Written essays were collected and analysed for CAL measures. Employing a multivariate multilevel approach, the results were triangulated with self-report data. Findings indicate that task repetition significantly impacted CAL in L2 writing, with a positive moderation effect by task complexity. Additionally, task motivation enhanced syntactic complexity in both simple and complex tasks, with negligible effects on accuracy. Notably, task motivation exerted a more substantial influence on students’ repeated task performance concerning lexical complexity. The study’s results offer theoretical and pedagogical insights for TBLT researchers and L2 writing practitioners.","PeriodicalId":47852,"journal":{"name":"Language Teaching Research","volume":"45 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142487439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"文学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A self-regulation perspective on L2 grit development and its impact on language achievement 从自我调节的角度看第二语言咬字发展及其对语言成绩的影响
IF 4.2 1区 文学
Language Teaching Research Pub Date : 2024-10-22 DOI: 10.1177/13621688241287501
Hitoshi Mikami, Tadashi Shiozawa
{"title":"A self-regulation perspective on L2 grit development and its impact on language achievement","authors":"Hitoshi Mikami, Tadashi Shiozawa","doi":"10.1177/13621688241287501","DOIUrl":"https://doi.org/10.1177/13621688241287501","url":null,"abstract":"Evidence from recent studies has shown that sustained perseverance and passion for long-term goals in the domain of second language (L2) learning – a personality trait called L2 grit – is associated with various aspects of language learning, including positive psychological attributes (e.g. motivation, beliefs, and emotions), actions (e.g. learning efforts and strategy use), and achievement (e.g. course and task performance). Meanwhile, relatively little has been written about the mechanism through which such relationships emerge. Expanding upon L2 grit’s association with self-regulated learning (SRL) behaviors and SRL-related psychological variables, this study explores the development of L2 grit and its role in language achievement using the SRL framework. One hundred and eight English majors in Japan responded to a questionnaire, granted permission to access their L2 class records, and completed a standardized L2 test. The main findings include: (1) the psychological attributes that facilitate SRL may play a critical role in increasing levels of L2 grit, (2) the relationship between L2 grit and achievement in language classes was mediated by behavioral self-regulation (intensified learning efforts), and (3) L2 grit may promote different types of self-regulatory behaviors depending on learners’ status (i.e. learning experience and proficiency levels) and learning situations (e.g. learning content and goals). The results provide one explanation for the superior performance of gritty learners in L2 classes observed in previous studies.","PeriodicalId":47852,"journal":{"name":"Language Teaching Research","volume":"45 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142486782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"文学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modelling the effects of the reading medium on L2 Spanish reading emotions: The moderating role of individual difference variables 阅读媒介对第二语言西班牙语阅读情感的影响建模:个体差异变量的调节作用
IF 4.2 1区 文学
Language Teaching Research Pub Date : 2024-10-11 DOI: 10.1177/13621688241284379
Fan Yang, Xiaoming Yang
{"title":"Modelling the effects of the reading medium on L2 Spanish reading emotions: The moderating role of individual difference variables","authors":"Fan Yang, Xiaoming Yang","doi":"10.1177/13621688241284379","DOIUrl":"https://doi.org/10.1177/13621688241284379","url":null,"abstract":"While existing research has documented that the reading medium significantly impacts language learners’ reading comprehension processes and outcomes, empirical evidence on how the reading medium influences reading emotions is lacking. The present study contributes to the field by investigating whether reading emotions (i.e. enjoyment, anxiety, and boredom) of learners of Spanish as a second language (L2) differ between mobile-assisted and paper-based reading processes. In addition, it explores whether individual difference variables (i.e. L2 Spanish proficiency and preferences for the reading medium) moderate the relationship between the reading medium and reading emotions. The instruments used are reading comprehension tests and questionnaire surveys administered to a sample of 245 first-year college students majoring in Spanish. Paired samples t-tests indicate that L2 Spanish learners perceive more enjoyment and less negative emotions when reading from a paper-based format than those from a mobile-assisted mode. In addition, moderation analyses indicate that both L2 Spanish proficiency and preferences for the medium are moderators of the relationships between the medium and reading emotions. More proficient L2 Spanish readers perceive more enjoyment and less anxiety and boredom when reading from paper than those from mobile phones; less proficient L2 readers demonstrate the opposite pattern. Students’ preference for mobile-assisted language reading would significantly enhance their reading enjoyment while reducing reading anxiety and boredom when they engage in such a type of reading mode. These results imply that individual differences are crucial factors in shaping students’ emotions across different reading modes. Reasons for differences in reading emotions across mediums and the moderating roles of individual variables are discussed.","PeriodicalId":47852,"journal":{"name":"Language Teaching Research","volume":"43 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"文学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Notes on contributors 关于撰稿人的说明
IF 4.2 1区 文学
Language Teaching Research Pub Date : 2024-10-10 DOI: 10.1177/13621688241291800
{"title":"Notes on contributors","authors":"","doi":"10.1177/13621688241291800","DOIUrl":"https://doi.org/10.1177/13621688241291800","url":null,"abstract":"","PeriodicalId":47852,"journal":{"name":"Language Teaching Research","volume":"27 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142405149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"文学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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