bis

Our neighbour's a very careless bis driver; he never thinks about what he's responsible for.

我们的邻居是个粗心大意的公共汽车驾驶员,从来不考虑自己有什么责。

Preparation of ethylene bis stearamide using stearyl chloride and ethylenediamine (EDA) as raw materials has been studied.

了以乙胺硬脂酰氯为原料制备乙撑双硬脂酰胺的应,讨论了原料配比、应时间、应温度的影响。

In this thesis, the reaction of aldehydes with dimethyl -- dichlorosilane producingdimethylsilyl bis -- enol ethers has been studied.

本文对醛基氯硅烷应合成硅基双烯醇醚进行了。

Some experiments were did on herbicide activity, and had found that activities of some compounds was good,especially 3,6-bis-benzyl-s-tetrazine.

对其中部分化合物进行了生物活性实验,发现有些化合物显示了较好的活性,同时发现烷基取代基的引入可以提高除草活性。