Research and Development of Chemical Agent;

产品研究与开发；

A chemical agent that kills eggs, especially the eggs of insects.

一种杀灭螨虫的化学药剂。

This is a chemical agent that destroys plants or inhibits their growth.

这是一种能除草或抑制其生长的化学药剂。

The chemical agent must be delivered in order to threaten someone, and the threat can be countered.

化学毒剂必须通过投放来实现威胁，而且这种威胁可以防范。

A certain injecting temperature is necessary at the beginning of injecting the chemical agent m.

在启动过程中掺入化学剂的温度对油井生产有一定的影响。