It leaves no trace after fire extinguishing.It replaces for alkylogen annihilator.

灭火后不留痕迹，是卤烷灭火器替品。

The sailing ships were superseded by the steamships.

帆船已被汽船所。

The enemy may have recourse to steel instead of poison.

人可能用凶器来放毒。

The use of machinery has superseded manual labour.

机器使用已经了手工劳动。

He bears a grudge against me because I took his place in the office.

他对我怀恨在心,因为我了他在办公室里位置。

In most offices, the typewriter has now been supplanted by the computer.

当今许多办公室里, 打字机已被电脑。

In this reaction,besides substitution products thiophenol etc,the reduction product benzene is formed.

反应中，除生成笨硫酚等产物外，还生成还原产物苯。

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

芳基聚炔及其衍生物呈现出光电磁等许多新颖能。

The chromogenic responding ability increases as the substituent changes from phenyl to naphthyl or anthryl.

实验结果表明，偶氮基团引入改善了8-羟基喹啉生色能力，并且在乙腈溶液中随着基由苯基变为萘基和蒽基时，化合物吸收光谱发生红移。

Engineers are still trying to come up with a commercially viable replacement for internal-combustion engines.

工程师在设法造一种在商业上切实可行发动机来内燃机。

Should radical vulvectomy be replaced by wide local excision for vulval cancers?

根治外阴切除术应该被扩大局部切除术？

Custom Built Dual Pass Reverse Osmosis System - Replaced existing automatic deionizer for plating operation.

双通道反渗透系统——现有自动电镀脱离子剂。

EASTMAN Color Internegative film, 5245. False sensitized. Replaced 5243. Discontinued in 1956.

伊士曼彩色电影中间片5245了5243。它也于1956年停产。

Two series of tolan-type liquid crystals containing terminal cyano group were synthesized.

设计并合成了一类新型末端氰基含氟二苯乙炔类液晶。

By and by electricity will take the place of coal.

不久以后, 电将煤。

The tacticity of polymers is mainly influenced by the polarity of substituent group of vinyl monomer.

作者认为影响聚合物等规度因素主要是基极效应。

The R2SO were later replaced by the Blue two-suiter overcalls which is more descriptive and effective.

R2SO后来被更详尽和有效蓝梅双套盖叫法了.

The performance of zinc dust paint manufactured by partially ferrophosphorus - substituted zinc dust were introduced.

着重介绍了磷铁粉部分锌粉备锌粉漆特,并给出了3类锌粉漆参考配方。

Where good natural protection is not available a fixed hanger or ringbolt should replace the piton.

若该处并无良好天然支点，则应以固耳片或环形锚栓该岩钉。

MNDO calculations and group theory were carried out on tetraphenyl porphyrine(TPP) to obtain its optimum molecular geometry.

运用MNDO计算和群论，优化得到了较满意中位四苯基卟啉(H2TPP)分子构型。