Polybromide
多溴化合物
🗣️ 情景例句
There's so many things to talk about.
有许多事情需要讨论。
The master always exacts quality work from his students.
老师常常要求学生们认真踏实的完成功课。
Take it easy, you will be all right in a couple of days.
别担心，你两天之内就会痊愈的。