Aryl substituted polyacetylenes and their derivatives exhibit a lot of novel optical, electric, magnetic properties.

芳基取代聚炔及其衍生物呈现出光电磁等许多新颖的性能。

These on reduction with NaBH4 gave exclusively cis-3-heterocycle substituted chroman-4-ols in good yields.

【文摘】3,3-Dibromochroman-4-ones on reaction with different heterocyclic secondary amines gave 3-substituted chromones.

A small creeping herb(Dichondra micrantha) commercially cultivated as a substitute for lawn grass.

一个禾本科植物属，有蔓，丛生或多年生或一年生；指状禾草；蔓延阿利昂花。

We substitute margarine for cream because cream is fattening.

我们用人造黄油代替油,油会使人发胖。

Yogurt is a perfectly acceptable substitute for cream in cooking.

酸是烹饪用的特别受欢迎的油替代品。

I found someone to substitute for me.

我找到了一个人接替我。

He substituted as the typist in the office.

他代替做这个办公室的打字员。

Can you substitute for the singer who is ill?

你能替一下那位得了病的歌手吗?

In this cake mixture, you can substitute oil for butter.

在这种做蛋糕的配料中, 你可用食用油代替黄油。

As Mr. Sinclair was ill, Mr. Cook substituted as our teacher of chemistry.

由于辛克莱先生病了, 库克先生代任我们的化学老师。

Mouser Electronics stocks suitable parts if you substitute a pair of 0.47uF caps for the 1uF electrolytics.

电影帽子实在有点大,但有空间,如果你把一些工作,寻求微型零件.

Chlorpyrifos was one kind of organophosphorus pesticides with higher efficacy and could substitute highly poisonous metham-sodium and parathion.

死蜱是替代甲胺磷和对硫磷等高的高效有机磷杀虫剂,在世界范围得到广泛使用。

Constituents that can be substituted for one another without loss of grammaticality belong to the same syntactic category.

可相互替换而又不改变语法属性的成分属于同一句法类型。

From early on, we can start introducing woggle to our baby as a substitute for our arm support.

在爸妈与宝宝熟悉在水中活动后，可开始使用「浮条」来代替爸妈的手，让宝宝在水中学习自主。

This article is a study of methylene chloride as a substitute for trichloro-fluoromethane in producing flexible polyurethane foam.

讨论了用二氯甲烷替代一氟三氯甲烷进行软质聚氨酯泡沫塑料的生产。

A comparison was made among the cure characteristics and physical properties of three different substituted thiuram accelerators in NR.

对3种不同取代基的秋兰姆类促进剂在天然橡胶中的硫化特性及物理性能进行了比较。

Isopropenyl acetate was synthesized from ketene and acetone by direct esterification using strong acidic cation-exchange resin to substitute H2SO4 as catalyst.

乙烯酮和丙酮原料,用强酸性离子交换树脂代替浓硫酸作催化剂,直接酯化合成乙酰丙酮的中间体乙酸异丙烯酯。

The synthesis of fluorine substituted saponite was explored and suceeded under mild temperature hydrothermally.Microwave-hydrothermal synthesis of sapontie was performed first time.

对于层状材料的微波水热快速合成研究也进行了首次探索，发现可在可接受的合成条件下得到具有三八面体结构的皂石。

In order to get polyaryloxyphosphazene, polyphosphazene's side chlorines are directly substituted by aryloxy of phenol using triethylamine as the bind acid agent.

然后三乙胺缚酸剂，使高聚氯化磷腈直接与酚类化合物进行取代反应，合成了标题高聚物。

This patent pool license provides users with fair, reasonable, nondiscriminatory access to the new technology as a platform which substitutes individual license negotiations.

专利池作单一专利许可的平台替代各自分别交涉专利许可，它有利于用户能会按照公平、合理、无歧视原则接受此项高新技术。