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Some pedicels of butterfly orchid were employed as explants to study the factors of the basic medium、6-BA、variety、the node in pedicel etc.

实验以蝴蝶兰花梗为外植体，采取组织培养的方法，设置多项平行处理，目的在于对影响腋芽诱导的基本培养基、6 BA、母株品种、花梗节位等因素进行研究。

In this thesis, we developed chiral proton N-O type ligands and employed them in the enantioselective addition of diethylzinc to N-diphenylphosphinoyl imines. The relationship between the structure of the ligands and the enantioselectivity was systematically studied. Furthermore, enantioselective butylation of N-diphenylphosphinoyl imines withBu〓Zn and enantioselective diphenylzinc addition to imine were also examined.

本文致力于亚胺的不对称催化有机锌试剂加成反应的研究：以手性质子型N-O配体为促进剂，对N-二苯基次膦酰亚胺进行不对称乙基锌加成反应而展开研究工作，系统地考查了手性配体的结构对反应的影响；另外，对N-二苯基次膦酰亚胺的不对称催化丁基锌加成进行了研究，并首次对亚胺的不对称苯基锌加成反应进行了初步探索。

Firstly, quantum chemical method was employed to investigate the mechanism of cationic ring-opening polymerization of tetrahydrofuran and butylene oxide.

本文首先应用量子化学方法分别探讨了四氢呋喃和环氧丁烷的阳离子开环聚合反应机理。

Accordingly, it is expected to get Organic/inorganic multilayer films that have excellent photoconductive properties. Furthermore, in order to investigate the mechanism of photoconductivity, Zinc sulphide , which is transparent in visible region, and cadmium sulphide , which has optical absorption in visible region, were employed as inorganic layers.

通过CuPc和ZnS、CdS的层状复合，期望能有效发挥各自材料的优势，并充分利用多层复合膜的界面性能等，特别是CuPc/CdS复合膜可以拓宽复合膜的响应光谱，提高复合膜光电导性能，从而制备出具有优异光电导性能，稳定性好的光电材料。

The incandescent calcium light invented by Thomas Drummond in 1816 was first employed in a theatre in 1837 and was widely used by the 1860s.

1816年杜伦孟德发明了钙光灯，1837年首次用于剧场，到19世纪60年代就被广泛采用。

The incandescent calcium light invent ed by Thomas Drummond in 1816 was first employed in a theatre in 1837 and was widely used by the 1860s.

1816年杜伦孟德发明了钙光灯，1837年首次用于剧场，到19世纪60年代就被广泛采用。

Two years of field experiment data was employed to calibrate and validate the model independently.

同时也指出了模型的一些不足和需要改进的地方。

The suggestions employed on different river segments included buffer strips, wetland creation and restoration, habitat diversity creation and near-nature engineering, separately could alleviate human disturbances and canalization effects, link broken river corridor, and improve habitat quality and biodiversity.

此外，鉴於B河段河川渠道化日益加深，导致河流廊道潜在栖地消失与河廊联系中断的情形，建议以近自然工法护岸及护堤的规划加以改善。

The semi-analytical solution for Hamilton canonical equation is employed widely in the engineering problems in recent years.

近年来，Hamilton正则方程半解析法在工程问题上的应用越来越广泛，但至今未见有关这种方法收敛性和对称性问题研究的文献。

If it seems appropriate to use the tragic style, then the illustrious vernacular must be employed, and so you will need to bind together a canzone.

如果适合于悲剧文体，那么必须使用高贵的方言，进而也需要用到歌曲。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。