查询词典 olefins

As the quality of 8B and 20# aviation engine oils from soft wax cracking is unstable and product yield is low, the semi-refined wax was used as feedstock of optimized cracking process to produce C5～13 normal alpha olefins, which are synthesized to yield the base oil of 8B and 20# aviation engine oils.

针对8B和20号航空润滑油产品质量不稳定、产品收率低等难题，在优化裂解工艺的基础上，以半精炼蜡裂解生产的C5～C13正构α-烯烃为原料，同时合成8B和20号航空润滑油。

The experiment results indicated that the hydroformylation of C〓 straight chain higher olefins could well conduct under TPSC system.

实验结果表明，温控相分离催化体系可很好地催化C〓直链高碳烯烃氢甲酰化反应。

A A reactionEffective experimental conditions for 1 mmol olefins in the AA reactions employed 3.1 equiv.

配体在对甲基肉桂酸甲醋的AA中立体选择性最高，产物的光学纯度为96%ee。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。