Monocs
代森二甲胺
🗣️ 情景例句
I've been studying all day, and I'm sick and tired of it.
我学了一天，现在感到厌倦。
My son wants to get married in June.
我的儿子想要在6月结婚。
The question was, which one?
问题是，哪一种气体导致火灾呢？