Diphenychlorarsine
二苯氯化胂
??? 情景例句
The way to learn a language is to practice speaking it as often as possible.
學習一門語言的方法就是要盡量多地操練說出它來。
Let's call it a day.
我們今天就到這兒吧。
I think you probably know China has adopted a flexible policy in her foreign trade.
我想你也許已經了解到中國在對外貿易中采取了靈活的政策。