高层语法单位研究的必要性

现代汉语语法研究，已从三级语法单位扩展到五级语法单位，向下，到语素，向上，到句群。然而句群决不是语言的最大单位。往上延伸，还应当有语团、段、节、章、篇等，由十级语法单位构成一个完整的语法“系统工程”。短语以下是语言的备用单位，即初级单位；句、句群、语团是简单的使用单位，即中级单位；段以上是复杂的使用单位，即高级单位。由初级到高级的结构关系的发展是一个从实现关系的逐渐繁化，到组合关系的逐渐繁化的过程，由越级实现的繁化到越级组合的繁化反映了现代汉语各级语法单位由初级到高级结构形式逐渐繁化的趋势，高级语法单位的研究和学习对于语言运用更有意义。     

<毛诗诂训传>语法注释探析

我国古代没有系统的语法学,没有专门的语法著作,但在古人的注释实践中早已有了对语法现象的解释.西汉毛亨的<毛诗诂训传 >中就有许多解释语法的事例,有辨明词的虚实以及具体词性的,有补出省略成分的,有调整特殊语序的,也有分析词组的语法结构关系的.     

两汉语法研究综述

两汉时期的归属问题在汉语史研究中一直存在争议,从语法上至今还没有人对相关研究进行回顾,笔者从虚词、句式两个方面进行综述并指出其中存在的一些问题。     

Focus on Form：高中语法教学的新途径

分析了Focus on form的涵义,重点探讨了Focus on form在高中语法教学中的应用,指出Focuson form是在第二语言教学中兼顾形式和意义,促进目标语发展的一种有效手段。提出了目标结构的可理解性输入,引导学生发现性学习,显性教学,必用目标语结构的交际任务,反馈与纠错等具体实施方法。     

普通逻辑与语法、修辞联系探析

普通逻辑是研究思维形式和思维规律的，它管的是语言内容对不对的问题；语法研究的是语言的结构规律，它管的是组词造句通不通的问题；而修辞研究的是提高语言表达效果的规律，它管的是语言材料选择得好不好的问题。普通逻辑与现代汉语中的语法、修辞之间存在着密切联系，语法、修辞都要以逻辑为基础。     

传统汉语语法对英语写作教学的负面影响

怎样教中国学生写好英语作文一直是困扰中国教师的一个问题。针对这一问题,笔者对传统汉语语法给英语写作教学带来的负面影响进行了探讨;并提出在英语写作教学实践中比较英汉两种语言的特点;用新的现代语言学理论系统功能语法的指导写作教学。     

大学英语教学中需要重视语法运用能力

本文作者通过对2005年1月我省高职高专考生参加全国英语应用能力考试情况的分析,认为在大学英语教学中还应重视英语语法运用能力的提高。文中还就如何提高语法运用能力提出了若干建议。     

Molecule matters

Carbon dioxide is a fascinating molecule; its gaseous, liquid, solid and even supercritical fluid states have unique properties and applications. The linear triatomic structure of carbon dioxide molecule with two carbon-oxygen double bonds is all too familiar. However a whole new world has been opened up by high pressure-high temperature experiments that effected the polymerization of this small molecule into a covalent network structure with carbon-oxygen single bonds. The crystalline and amorphous forms of carbonia are built up of linked tetrahedral CO₄ units.     

Molecule matters

Divalent carbon compounds which were once considered as highly reactive organic intermediates have been tamed by the modern day synthetic chemist in the form of N-heterocyclic carbenes. The land marks in the history of development of these compounds and their applications as ligands in the Nobel Prize winning work on olefin metathesis catalysts are described. Anil J Elias is a professor at the Department of Chemistry, Indian Institute of Technology, Delhi.     

Molecule matters

4-(N,N-dimethylamino)benzonitrile, popularly known as DMABN, has received tremendous attention for nearly five decades. In this article, we outline some of the features of the molecule that have made it such an interesting system to study, such as fluorescence emission in two wavelengths. The article also highlights how limited our understanding of the excited state structure of a small molecule like DMABN is, despite the availability of various resources to investigate it. Anunay Samanta is a professor of chemistry at the University of Hyderabad. Mainly he is interested in photophysics and time-resolved spectroscopy. Design of fluorosensors and study of photophysical response of molecular systems in ionic liquids are two of his current research topics of interest.     

Molecule matters

The first stable compound with a ‘quintuple bond’ reported recently is an exciting development that raises fundamental questions in theoretical and experimental chemistry.     

自责

从前有座山,山里有个庙,庙里有一个和尚……这个小时候的摇篮故事你还记得吗?故事新说,听听王成给我们讲新故事啦!     

Molecule matters

Ever since its isolation in 1820, Quinine has played a crucial role in the development of organic chemistry, chemical industry and modern medicine. The total synthesis of quinine, widely regarded as an event of epochal importance was claimed by Woodward and Doering in 1945. This work, however, heavily relied on unsubstantiated literature reports and it appears that Woodward’s work fell short of a total synthesis of quinine. The first stereoselective total synthesis of quinine was accomplished only in 2001, by Stork, who incidentally is the originator of the concept of stereoselectivity in total synthesis. Naturally, this work has been attested as a landmark in organic synthesis by leaders in the field.