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They were principally used to catalyze aldol, allylation, Diels - Alder, ene and Friedel - Crafts reactions.是什么意思？

They were principally used to catalyze aldol, allylation, Diels - Alder, ene and Friedel - Crafts reactions.

它们主要被用来催化Aldol, 烯丙基化, Diels-Alder, Ene和 Friedel -Crafts等反应.

相关词汇
they were principally used to catalyze aldol allylation alder and Crafts reactions

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

principally

adv. 主要地，大部分；

used

adj. 用过的，习惯于，二手的，旧的；v. 使用（ use的过去式和过去分词），常常，经常；

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

catalyze

vt. 催化，促进；

aldol

n. 丁间醇醛；

allylation

烯丙基化（作用）；

alder

n. 桤木；

and

conj. 和，与，而且，于是，然后，因此；

Crafts

n. 工艺( craft的名词复数 )，行业，飞机，飞行器；

reactions

n. 反应( reaction的名词复数 )，反动，反对，反作用力；
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