Halogens
卤族
🗣️ 情景例句
You have a good command of English.
你的英语水平很好。
In college I majored in math, What was your major?
大学时我主修数学，你主修什么呢？
As a matter of fact, we would like to discuss internally regarding item B.
事实上，我们希望可以先内部讨论B项议题。