Though language teachers filter much of the methods and content through their own systems, the discourse about foreign language education in China has mainly concentrated on the accessible behavioral aspects rather th...Though language teachers filter much of the methods and content through their own systems, the discourse about foreign language education in China has mainly concentrated on the accessible behavioral aspects rather than on the teachers' mental lives and personal styles. Based on the distinctions of relevant concepts and a local teacher survey, this paper first analyzes the hidden side of the language teaching style through a systematic reflection on the belief-behavior inconsistency of the language teachers, and then advocates a need to focus on the covert style of Chinese individual teachers as well as an effort to look beyond methodological theories and to take teachers' competence and conditions into consideration.展开更多
In plants, post-transcriptional gene silencing(PTGS) protects the genome from foreign genes and restricts the expression of certain endogenous genes for proper development. Here, we review the recent progress about ho...In plants, post-transcriptional gene silencing(PTGS) protects the genome from foreign genes and restricts the expression of certain endogenous genes for proper development. Here, we review the recent progress about how the unwanted PTGS is avoided in plants. As a decision-making step of PTGS, aberrant transcripts from most endogenous coding genes are strictly sorted to the bidirectional RNA decay pathways in cytoplasm but not to the short interference RNA(si RNA)-mediated PTGS, with the exception of a few development-relevant endogenous si RNA-producing genes. We also discuss a finely balanced PTGS threshold model that plants fully take advantage of the power of PTGS without self-harm.展开更多
Based on Bhatia＇s multi-dimensional analytical framework for discourse analysis, we explore key issues involved in genres construction such as private intention, manipulation of generic value and interdiscursive stra...Based on Bhatia＇s multi-dimensional analytical framework for discourse analysis, we explore key issues involved in genres construction such as private intention, manipulation of generic value and interdiscursive strategies. Two prefaces and two book reviews by expert linguists were collected and analyzed at great length from both text-internal and text-external perspectives. Meanwhile, four professionals from relevant disciplines were interviewed for their insights into the issues investigated. Through examining textual features, covert interdiscursivity and narrative accounts of the professional writers, the following findings are generated. 1） Generic variation occurs within and between the two genres due to expert writers＇ intentional manipulation of generic value. 2） Interdiscursive strategies like ＂genre embedding＂, ＂genre bending＂ and ＂genre mixing＂ are exploited by expert writers to achieve their particular private intention. Specifically, preface genre can be presented, to some extent, as a research article mixed with some promotional flavor, and features of research article genre, promotional genre and introductory genre are found mixed in the review genre. 3） Representations of the preface and book review genres such as linguistic feature, move structure and interdiscursivity are ultimately affected by generic value, authors＇ private intention, professional practice and disciplinary culture. The findings have important implications for ESP/EAP writing practitioners and learners.展开更多
文摘Though language teachers filter much of the methods and content through their own systems, the discourse about foreign language education in China has mainly concentrated on the accessible behavioral aspects rather than on the teachers' mental lives and personal styles. Based on the distinctions of relevant concepts and a local teacher survey, this paper first analyzes the hidden side of the language teaching style through a systematic reflection on the belief-behavior inconsistency of the language teachers, and then advocates a need to focus on the covert style of Chinese individual teachers as well as an effort to look beyond methodological theories and to take teachers' competence and conditions into consideration.
基金supported by the National Basic Research Program of China(2012CB910902)the National Natural Science Foundation of China(9121730591017010)to H.G
文摘In plants, post-transcriptional gene silencing(PTGS) protects the genome from foreign genes and restricts the expression of certain endogenous genes for proper development. Here, we review the recent progress about how the unwanted PTGS is avoided in plants. As a decision-making step of PTGS, aberrant transcripts from most endogenous coding genes are strictly sorted to the bidirectional RNA decay pathways in cytoplasm but not to the short interference RNA(si RNA)-mediated PTGS, with the exception of a few development-relevant endogenous si RNA-producing genes. We also discuss a finely balanced PTGS threshold model that plants fully take advantage of the power of PTGS without self-harm.
基金supported by China National Social Sciences Grant entitled A Genre-based Study of the Dynamic Interdiscursive System in Chinese and English Professional Discourse(NO.17BYY033)
文摘Based on Bhatia＇s multi-dimensional analytical framework for discourse analysis, we explore key issues involved in genres construction such as private intention, manipulation of generic value and interdiscursive strategies. Two prefaces and two book reviews by expert linguists were collected and analyzed at great length from both text-internal and text-external perspectives. Meanwhile, four professionals from relevant disciplines were interviewed for their insights into the issues investigated. Through examining textual features, covert interdiscursivity and narrative accounts of the professional writers, the following findings are generated. 1） Generic variation occurs within and between the two genres due to expert writers＇ intentional manipulation of generic value. 2） Interdiscursive strategies like ＂genre embedding＂, ＂genre bending＂ and ＂genre mixing＂ are exploited by expert writers to achieve their particular private intention. Specifically, preface genre can be presented, to some extent, as a research article mixed with some promotional flavor, and features of research article genre, promotional genre and introductory genre are found mixed in the review genre. 3） Representations of the preface and book review genres such as linguistic feature, move structure and interdiscursivity are ultimately affected by generic value, authors＇ private intention, professional practice and disciplinary culture. The findings have important implications for ESP/EAP writing practitioners and learners.
