Perchlorether
[化] 全氯乙醚
🗣️ 情景例句
If you need anything, just ask.
假如你需要什么尽管讲。
Which would you prefer, a smoking seat or a non-smoking seat?
你喜欢哪种，吸烟座还是禁烟座呢？
Can we substitute in these things?
这几项可以用替代品吗？