查询词典 olefin

Halogen, proton acids, sub-halogen acid are electrophilic reagents, olefin addition reaction is the electrophilic addition reaction .

卤素、质子酸，次卤酸等都是亲电试剂，烯烃的加成反应是亲电加成反应。

In this work, alpha-olefin (carbon number 14, 16, 18) were used as materials, the alpha-olefinsulfonates (AOS-h,AOS-14, AOS-16, AOS-18) were synthesized with applying gas SO_3 Film-Reactor,and its application properties in EOR were studied.

本文以直链α-烯烃为原料，采用气体三氧化硫膜式磺化合成了α-烯烃磺酸盐(AOS-h，AOS-14，AOS-16，AOS-18)，并应用于三次采油工业中。

Cotton, the specialty cellulosic fibers rayon, acetate, triacetate, wool and silk, polyester, nylon, olefin, sulfar, aramid, and PBI fibers are composed of homopolymers.

棉，专业纤维素纤维纱线，醋酸纤维，三醋酸纤维，羊毛和丝，聚酯纤维，尼龙，烯烃类纤维，萨尔法尔，芳香族醯胺纤维，和PBI纤维是均聚物的一部分部分。

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。