Perchlorethane
[化] 全氯乙烷
🗣️ 情景例句
Both are equally effective.
两者都有效。
First, Mr. Stone Lee, our sales manager, will make a few remarks.
首先，请我们销售经理世通先生发表讲话。
It will be by special invitation only.
我们只邀请特别的客户