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.

研究了胺和硬脂酰氯为原料制备撑双硬脂酰胺的应,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.

醛和甲基氯硅烷应合成甲硅基双烯醇醚进行了研究。

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提高除草活性。