选择性的

The novel synthesis of the 2-hydroxyl α-arylglycines was realized through the Lewis acids promoted Friedel-Crafts reaction of phenols and N-tosyl imino ester in mild reaction conditions.

其中在路易酸TiCl〓促进下，酚类化合物和亚胺酯发生的傅克反应，可较高产率、较高区域选择性的得到2-羟基α-芳香甘氨酸衍生物。

This makes the nonlinear NDT a unique defect-selective instrument for localising and imaging of nonlinear flaws.

这样产生了一种独特的对缺陷有选择性的非线性无损检测仪器，用于对非线性缺陷进行定位和成象。

We will focus on selected industry verticals, and build both our component and integration capabilities.

我们将着眼于有选择性的垂直工业，并且发展我们的整合和兼并能力。

Here we show that differential RNA export between normal and tumor cells is the major determinant of ONYX-015 oncolytic selectivity.

这里我们说明了正常细胞和肿瘤细胞RNA导出的差异是决定ONYX-015溶癌选择性的重要因素。

These data reveal that tumor cells have altered mechanisms for RNA export and resolve the controversial role of p53 in governing ONYX-015 oncolytic selectivity.

这些数据说明了肿瘤细胞已经改变了RNA输出的机制并且也解决了关于p53控制ONYX-015溶瘤选择性的争论。

However, for the wireless mobile communication systems, the radio channel is frequency selective and time-varying.

对于无线通信系统，无线信道不仅是频率选择性的，而且是时变的。

A possible reaction mechanism for the formation of the benzyl-substituted 1, 4-adducts is proposed.

对于这种选择性的自由基加成反应，我们提出了可能的反应机理。

The system can selective trip the overcurrent line in 0.2 second so that a serious override trip can be avoided.

该系统能够在电网发生短路故障后0 。2 s内实现有选择性的快速断电，从而避免井下电网因越级跳闸而造成的大面积停电。

Finally, effect of the factors such as temperature, pressure and space velocity on the activity and selectivity of the catalyst were studied, and the optimized processing conditions were obtained.

最后，通过分析温度、压力和空速等工艺条件对合成二甲醚催化剂活性和选择性的影响规律，确定了反应的最佳工艺条件。

Finally, effect of the factors such as temperature, pressure and space velocity on the activity and selectivity of the catalyst were studied, and the optimized processing conditions were obtained.

最后，考察了温度、压力和空速等工艺条件对合成二甲醚双功能催化剂活性和选择性的影响，确定了反应的最佳工艺条件。

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％。