查询词典 aromatic

Aromatic gum resin; similar to myrrh.

一种类似没药的芳香树脂。

An aromatic gum resin obtained from various Arabian or E African trees; formerly valued for worship and for embalming and fumigation.

从阿拉伯或非洲的树木里提炼出的芳香的树胶树脂，以前用于崇拜仪式，亦用于涂抹尸体和熏蒸消毒。

Myrrh is an aromatic gum resin which oozes from gashes cut in the bark of a small desert tree known as Commifera Myrrha or the dindin tree.

没药是一种芬芳的树胶脂，从一种没药树，沙漠中的一种小树中提取，在树干上切割深深的裂缝，就会渗出来。

Emphasis: The halogenation on aromatic ring.

重点：芳环上卤化反应历程。

The author and his colleagues have performed the experiment before the introduction of electro- philic aromatic substitution or enolate halogenation in lectures.

作者和他的团队在介绍亲电芳基取代或烯醇卤化的课程前已经进行了实验。

In general, the products obtained from these Pd-catalyzed reactions are complementary to those obtained via traditional methods, such as electrophilic aromatic substitution and benzylic halogenation.

一般来说，这些产品来自钯催化反应是相辅相成的所得，经传统方法苄、电等替代卤代芳香。

In the heartwood of the old trunks, there is ample oak tannin and aromatic materials of oak, which ensures the quality of the oak products.

这种老树干的心材中，含有丰富的橡木单宁和橡木的芳香物质，是保证橡木制品质量的关键所在。

In the part two, we reported the classical Knoevenagel condensation between aromatic aldehydes and acyclic active methylene compounds or cyclic active methylene compounds containing heteroatom such as (2-thio)barbituric acid, Meldrum's acid using ionic liquids as reaction medium.

在第二部分中我们研究了离子液体中开链活性亚甲基化合物、杂环类活性亚甲基化合物如(2-硫代)巴比妥酸、Meldrum's酸与芳香醛之间的Knoevenagel缩合反应。

In one embodiment, the invention is a system for initiating free radical polymerization comprising: a in one part, one or more amido-borate compounds containing one or more anionic amido-borate moieties comprising an organoborate wherein the boron atom is bonded to a nitrogen atom of ammonia or an organic compound containing one or more nitrogen atoms, such as a hydrocarbyl amine, a hydrocarbyl polyamine, or an aromatic heterocycle containing one or more nitrogen atoms and optionally containing one or more heteroatoms or heteroatom containing functional moieties, and one or more cationic counter ions and b in a second part, a liberating compound which reacts with the nitrogen atom bound to the boron atom upon contact with the amido-borate to form an organoborane radical.

在一个实施方案中，本发明是引发自由基聚合的体系，包括：a在一个部分中，一种或多种含有一个或多个包含有机硼酸根的阴离子酰氨基-硼酸盐部分和一个或多个阳离子抗衡离子的酰氨基-硼酸盐化合物，其中的硼原子键合到氨的氮原子或含一个或多个氮原子的有机化合物，例如烃基胺、烃基聚胺或含一个或多个氮原子和任选含一个或多个杂原子或含杂原子的官能部分的芳族杂环的氮原子上，和b在第二部分中，在与酰氨基-硼酸盐接触时与键合到硼原子上的氮原子反应形成有机硼烷基团的释放化合物。

The factors such as introduction of aromatic heterocycle with small delocalization energy, formation of acceptor-donor structure, and strong electron-donating or electron-withdrawing abilities of substituents lead to the high third-order nonlinear optical property.

引入离域能小的芳杂环，形成吸供构型，增大取代基的吸或供电子能力等有利于获得较大的三阶非线性光学性能。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"