查询词典 ethnic groups

This follows by a more gradual formation of ether, hydroxyl and terminal vinyl groups with time and concentration.

此前，随着时间和浓度，逐渐形成更多的醚类、羟基和乙烯基作为终端的产物。

Randoming 240 cases into 2 groups,one for Hygeia curing,other for microwave treatment.

纳米银组给予纳米银外用抗菌凝胶治疗(每天1支，6d为1疗程)，微波组在月经干净后3~7天行微波治疗，两组均在1月后复查。

This article carried on 4 groups to the strong sulfuric acid hygroscopicity and the dehydration property to test.

本文对浓硫酸的吸水性和脱水性进行了4组实验，成功地利用微型化实验的手段对浓硫酸溶于水，浓硫酸吸收水分，浓硫酸与纸屑、棉花、木屑和蔗糖的反应进行了设计。

An insect of the order Hymenoptera,including the bees, wasp s,and ants,often living in complex social groups and characteristically having two pairs of membranous wings.

膜翅类昆虫膜翅类的任何一种昆虫，包括蜜蜂、马蜂、蚂蚁，经常有复杂的社会群体有两对膜翅是这类动物的特点

An insect of the order Hymenoptera, including the bees, wasps, and ants, often living in complex social groups and characteristically having two pairs of membranous wings.

膜翅类昆虫膜翅类的任何一种昆虫，包括蜜蜂、马蜂、蚂蚁，经常有复杂的社会群体有两对膜翅是这类动物的特点

An insect of the order Hymenoptera,including the bees,wasps,and ant s,often living in complex social groups and characteristically having two pairs of membranous wings.

膜翅类昆虫膜翅类的任何一种昆虫，包括蜜蜂、马蜂、蚂蚁，经常有复杂的社会群体有两对膜翅是这类动物的特点

In thisthesis, we first extend the vanishing theorem due to Lawson, Simons and Xinto the case of compact submanifolds of a hyperbolic space. Thus, by using thenew vanishing theorem for homology groups, we prove the topological spheretheorem for complete submanifolds in a hyperbolic space. Hence we generalizethe Shiohama-Xu topological sphere theorem.

本文进一步将Lawson-Simons-Xin同调群消没定理拓广到双曲空间中紧致子流形的情形，并运用这一新的同调群消没定理证明了双曲空间中完备子流形的拓扑球面定理，从而推广了Shiohama-Xu的拓扑球面定理。

According to the contrasts between the structure of PANI and that of POT, the conclusion could be made that steric hinderance effect of methyl groups in the poly-O-methylaniline is more prominent than induction effect and hyperconjugation.

比较聚苯胺和聚邻甲苯胺的结构可知，甲基取代苯环中的一个氢原子后，甲基对聚邻甲苯胺的空间位阻效应明显大于诱导效应和超共轭效应。

The most preferable substituents are methyl groups for positions R1 and/or R2, due to the existence of a hyperconjugation effect between the p z orbital of the central carbon atom and one of the C—H bond orbitals in methyl group.

当R1， R2位置是甲基时，由于碳原子的p z 轨道与甲基的一个C—H键轨道间存在强的超共轭效应，从而可以较大程度地降低α-氢转移反应的势垒。

B3LYP /aug-cc-pvDZ level of theory is applied to study the geometric structures, hyperconjugation and exchange repulsion of 13 isoelectronic equivalents of benzene obtained by successive replacement of CH groups by nitrogen atoms in benzene. More attention is paid to discussing how the energetic properties change upon the number of N atoms.

采用密度泛函理论的B3LYP方法在aug-cc-pvDZ基组上研究了13种苯及其含氮等电子体化合物的分子结构、能量和异构体相对稳定性，重点考察了含氮量对化合物含能性质的影响。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。