Perhalogeno-
[化] 全卤(代)(代替所有C上的氢)
🗣️ 情景例句
The work is coming along quite well.
工作进展得相当顺利。
I beg your pardon?
你说什么？
You've done very well. It's a pity you missed the sports meeting last week.
你学得不错嘛。很可惜，你错过了上周的运动会。