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任。

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

研究了以二胺和硬脂酰氯为原制备硬脂酰胺的反应,讨论了原配比、反应时间、反应温度的。

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

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。

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

本文醛和二甲基二氯硅烷反应合成二甲硅基烯醇醚进行了研究。