综述

At last ,it Concludes the direction of development of a social security system in China in the future

本文对社会保障制度的发展存在的问题，改革和完善我国社会保障制度的建议等方面进行了综述，最后总结出今后我国社会保障制度的发展方向。

Part two gives a brief account of the theories of English reading and lexicology, including their concepts and definitions. Here the writer retells and concludes the study on lexicology at home and abroad, that is lexical strategies.

第二部分是文献回顾，对有关阅读和词汇学的理论进行了综述，包括阅读、词、词汇和词汇学的基本概念以及内容和核心，还综述了国内外对词汇学的研究即提出的学习策略。

Review articles. Using computer or handworked searehes, summarize and analyse the international and domestic literatures, and reasonable analyse their study results. Finally propose derection and purpose on this study. 2. Extraction technology of anticancer active component in branches and leaves of Taxus yunnanensis.

本论文包括六部分内容，其研究方法、结果如下： 1、综述以计算机检索、手工追溯检索等手段相结合对国、内外有关红豆杉研究文献进行分类综述，对目前国、内外红豆杉的主要研究概况加以合理分析，提出课题研究的方向、意义。

Firstly, literature review examined the relative methods and theory about the impact of real estate taxes on housing price.

文献综述系统综述有关房地产税对房价影响的理论研究进展。

E. (2003) Vegetation dynamics on rangelands: a critique of the current paradigms.

这篇综述很经典，2005年以来在干旱区放牧生态系统领域被引用次数最高的综述

Vegetation dynamics on rangelands: a critique of the current paradigms.

这篇综述很经典，是2005年以来在干旱区放牧生态系统领域被引用次数最高的综述。

In chapter one,we introduce the background of our work and give abrief review of polaron theory.

在第一章中，我们首先对极化子理论和格林函数理论作一个简单的综述，并综述了低维系统中的极化子理论的研究现状，进而引出本论文所要研究的主要问题。

We reviewed the average requirement and the recommended intake of vitamin D in children, adults, elderly and pregnant and parturient women, and encouraged to increase the recommended intake of vitamin D; We also reviewed the risk of high-dose vitamin D intake and suggested to raise the maximum tolerable intake made by American CRN. Finally, we propose that Chinese Nutrition Society will consider to increase the UL of vitamin D from 20 μg to 50 μg.

本文综述儿童、成年人、老年人和孕产妇的平均需要量和推荐摄入量，鼓励增加维生素D的推荐摄入量；综述美国营养责任委员会对高剂量维生素D摄入风险的再评估，提高可耐受最高摄入量；最后建议能否考虑将中国维生素D的UL由20μg提高到50μg。

Advances in Research on Plants Reactions under Phosphate Starvation;2. Topics discussed in this article includes synthesis and structures of R2M24, the reactions of its metal-metal triple bond with various reagents such as nucleophiles, carbon-carbon mu.

本文对一类重要的ⅥB族金属叁键化合物R_2M_2_4(R为环戊二烯基及类环戊二烯基)近年来的研究成果进行了综述，综述重点是这类化合物的官能团M≡M参键的化学活性，全文包括R_2M_2_4的合成及结构，M≡M叁键与亲核试剂、与碳-碳重键，与氧或与金属羰基物等试剂的反应及其应用。

Topics discussed in this article includes synthesis and structures of R2M24, the reactions of its metal-metal triple bond with various reagents such as nucleophiles, carbon-carbon mu.

本文对一类重要的ⅥB族金属叁键化合物R_2M_2_4(R为环戊二烯基及类环戊二烯基)近年来的研究成果进行了综述，综述重点是这类化合物的官能团M≡M参键的化学活性，全文包括R_2M_2_4的合成及结构，M≡M叁键与亲核试剂、与碳-碳重键，与氧或与金属羰基物等试剂的反应及其应用。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失