选择性的

On the other hand, optional curtain airbag needed extra space for installation.

另外，选择性的窗帘式的汽袋需要更多的空间来安装。

This paper reviews the recent progress of all kinds of reductive amination methods and their ap-plications in organic synthesis, particularly emphasis on the introduction to the reductive amination with high efficiency and high selectivity.

综述了近几年来各种还原胺化方法的研究进展及其在合成中的应用，尤其对高效和高选择性的还原胺化进行了重点介绍

L-prolinamide/PPTS system was developed to catalyze Robinson annulation of 1,3-cyclohexanedione derivatives. Using this system, the functionalized carbon chain of Wieland-Wiescher ketone could be synthesized in high enantioselectivity, which was a useful synthon for structural diversity of total synthesis of natural product.

二、发现了L-prolinamide／PPTS体系可以催化Ronbinson环化1，3-环己二酮衍生物，实现含季碳且具有多官能团侧链的Wieland-Wiescher酮高对映选择性的合成，为天然产物结构多样性的合成奠定了基础。

However, led to a mixture of 4 and 5 the reaction with aryl ketone oximes. Regioselectivity of the reaction and configuration of the products are discussed.

文中讨论了反应物的空间效应、亲核试剂对该反应区域选择性的影响，并论证了产物的构型。

As a new method for asymmetric synthesis, enantioselective organocatalysis has become more and more popular.

作为不对称合成的一个新方法，对映选择性的有机催化已经成为越来越普遍应用的方法。

This paper expatiated the concept, history and actuality of biotope mapping, and introduced the method and model for mapping of biotope in German biotope mapping.

本文阐述了生态单元制图的概念，以及国外历史及现状，详细介绍了德国生态单元制图的方法和程序，并建议将其有选择性的运用到我国西部生态环境保护中。

Furthermore, the selective reductions of 2,2'-dinitrobiphenyl have been detailedstudied in the synthesis of achiral biphenyl backbones.

运用不对称活化的策略，成功地在Cu催化Et_2Zn对链烯酮的1，4-共轭加成反应中获得了高对映体选择性的加成产物。

It is true that the decisive moment' approach, in less disciplined hands, can degenerate into haphazard, unselective snap shooting.

在严肃摄影这一方，&决定性瞬间&的手法的确可以堕落以至于偶然事件，无选择性的快照。

Close-fitting gloves, nose guards, soft head gear are optional, and may be worn by all players.

此外，她们还可有选择性的配戴手套，护鼻和柔软的护头装置。

TRAIL induces apoptosis in a number of cancer cell lines and has broad-spectrum activity against human malignancies.

所以寻找新型高效有选择性的抗肿瘤药物是当今抗肿瘤药物研究开发的热点。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。