取代...

Pyrrole 2 and 3 using a different substituent for the replacement of its N-bit H on the effects of chemical shift.

吡咯2位与3位使用不同取代基进行取代后对其N位H上化学位移的影响。

We first introduced a new concept called transitive resolvable idempotent symmetric quasigroup, proved that the necessary condition for the existence of TRISQ is also sufficient, then presented a tripling construction for LKTS by using TRISQ instead of TKTS, thus removed the condition "there exists a TKTS" in Denniston''s tripling construction for LKTS; We also improved J. Lei''s product construction for LKTS by removing the condition "there exists a TKTS".

我们首先引入了可迁可分解幂等对称拟群的新概念，证明了TRISQ存在的必要条件也是充分的，然后给出了用TRISQ取代可迁Kirkamns三元系的LKTS的三倍构造法，这样就去掉了在Denniston的关于LKTS的3倍构造中的条件"存在一个TKTS"；我们用TRISQ取代TKTS改进了雷建国的关于LKTS的一个积构造方法，从而去掉了该构造方法中的条件"存在一个TKTS"。

the target compounds synthesized to synthesize a series after 4 - instead of aniline - 6 -(2 - hydroxyl replace c oxygen radicals) quinazoline compounds has laid a good foundation.

目标化合物的顺利合成为以后合成一系列4-取代苯胺-6-(2-羟基取代丙氧基)喹唑啉类化合物奠定了良好的基础。

The goal of the successful synthesis of compounds for the subsequent synthesis of a series of 4 - to replace the aniline -6 -(2 - hydroxy replace C oxy) quinazoline compounds laid a good foundation.

目标化合物的顺利合成为以后合成一系列4-取代苯胺-6-(2-羟基取代丙氧基)喹唑啉类化合物奠定了良好的基础。

Asymmetric hydrogenation of quinoline derivatives is a hot topic in asymmetric hydrogenation. However, some problems still remained.

芳香杂环化合物喹啉衍生物的不对称氢化一直是不对称氢化领域的一个热点，然而对于苄基取代喹啉和一些多取代的喹啉衍生物至今没有实现有效的不对称氢化。

Because of fluoride substitutions and quinoxaline structures, two new compounds are electron deficient. With alkyl substituted fluorenes, the two new compounds both have good solubility.

新的化合物因为含有氟取代基和喹喔啉结构使得整个分子呈缺电子状态，同时烷基取代的芴使得材料具有良好的溶解性。

Methods Using 4-chloro-2-nitroaniline as a starting compound, followed by substitution, reductive cyclization, oxidation, and chlorination, to give the key intermediate 2,7-dichloroquinoxaline (7), which reacted with different phenolic compounds to afford quinoxaline derivatives.

方法以4氯2硝基苯胺为起始原料经取代、还原关环、氧化、和氯代合成了中间体2，7二氯喹喔啉(7)，再在喹喔啉的2位引入不同的取代酚结构单元，合成了一系列共9个新喹喔啉衍生物。

The hydroxylphenyl porphyrins have a large value of the reverse saturation absorption and a large cubic nonlinear refractivity.

实验结果表明，它们具有大的反饱和系数和三阶非线性折射率，并且取代基数目和取代位置对实验结果有明显的影响。

First, I am replaceable and you are not.

第一，妳是不可取代的，而我是可取代的。

However, it is difficult for the quartz substrate to scale-down by photolithography. In this article, we develop another type of piezoelectric material, PbZrxTi(1-x)O3, as a thin film by sol-gel route to replace the quartz crystal as a resonator. The novel hydrothermal annealing with microwave system is proposed to substitute the conventional furnace annealing.

本研究则是用同样具有压电性质的材料锆钛酸铅(PbZrxTi1-xO3)，以溶胶－凝胶法制成压电薄膜，来取代传统的石英晶体；再以微波反应系统进行水热式退火，来取代传统高温制程上的热处理方式，同时根据实验结果，进一步推论水热式退火的反应机制。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。