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The catalytic efficiency of 7a was the best when acetone was used as Aldol donor, and the Aldol products were obtained with up to 78% ee in the presence of 10 mol% 7a.

对丙酮与醛的反应，7a的催化效果最好，在10％催化剂存在下产物ee值高达78％。

Removal efficiency of the two algaecide s was contrasted and removal mechanism was also discussed.

结果表明，这2种除藻剂可以缓释次氯酸，提高其稳定性，有较长的药效期。

Tertbutyl triazine might be a good algaecide with high efficiency and durative action.

特丁基三嗪具有高效、作用时效长的特点，可能是一种比较理想的赤潮藻去除剂。

Originally, these stacks were added to increase the execution efficiency of high level languages such as ALGOL.

早先，堆栈应用于来提高像ALGOL这样的高级语言的执行效率。

Improvement on efficiency of test pattern generation algor...

测试产生问题是VLSI测试最重要的问题之一。

The result of multiple experiments has testified the feasibility and efficiency of the algorism.

同时，作者通过大量实验，证明了本算法在实际应用中的可行性和有效性。

by summarizing and analysing the progress on studies of pharmacodynamic material basis of resuscitation-inducing aromatic herbs such as moschus,borneolum syntheticum,styrax,benzoinum, and exploring the generality of those herbs,to provide scientific reference for further studies on the relevance of common substance ,nature and the efficiency of restoring consciousness and inducing resuscitation of those herbs.the result indicates that those four resuscitation-inducing aromatic herbs mainly contain volatile oil ,and all contain alicyclic compounds; the volatile oil of borneolum syntheticum and styrax both contain sesquiterpenes of caryophyllene; as resin herbs , styrax and benzoinum both contain vanillin, resin ester and balsamic acid .

通过对芳香开窍药麝香、冰片、苏合香、安息香的药效物质基础研究进展的整理、分析，探索其共性，拟为深入研究该类药的共性物质—药性—开窍醒神效应之间的关联性提供科学参考。结果表明，四味芳香开窍药主含挥发油，均含有脂环化合物，并存在一些共有成分，如龙脑冰片与苏合香挥发油中均含有倍半萜类成分石竹烯；苏合香和安息香皆为树脂类中药，两者均含有香荚兰醛成分，尚含树脂酯，香脂酸等。

On the presentation of Mn-P fixation, this paper reviews the latest advances in recent 10 years and concentrates on the mechanism of phosphorus fixation in acid soils. In addition, it brakes through the classical inorganic P fractionation in to Fe-P, Al-P, O-P and Ca-Pin the traditional P classification and considers Mn-P as one of the main phosphorus fixation modes in latosols, cultivated from the parent basalt material. Furthermore, fixation of P by Fe, Al, Mn is compared, and differentiation from chemical availability and bioavailability of P discussed. Based on the above, this paper presents some alienable measures for enhancing P utilization efficiency and postulates pivotal future research directions in the field of P fixation.

本文以Mn-P的提出为出发点，论述了近10年来对酸性土壤固磷机理研究的新进展，突破了常规P素形态分级研究中分为Fe-P，Al-P，O-P和Ca-P等无机磷测定的经典分级，认为玄武岩母质砖红壤中的Mn-P是P素固定的主要形式之一，进而比较了Fe、Al、Mn对P固定作用，并从P的化学有效性与生物有效性差异等方面进行了比较全面的论述，提出了减少P素固定提高磷肥利用率的措施及今后的重点研究方向。

Thus, the tool shank not only easily changes the height of tool tip to align the center but also apply to traditional lathe to increase convenience and efficiency of the operation.

其构造亦可适用於一般车床刀座上使用，藉以提高工作效率及改善使用上的便利性，且更为安全。

The experimental results indicated that their synergistic efficiency depended on the amount of alizarin and β-carotene used.

膨胀计法研究表明Alz和β-C对AIBN引发的苯乙烯自由基聚合有阻滞作用，发现Alz与β-C间存在明显的协同阻、缓聚作用。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。