Dmk
[医][=demethylketene]脱甲基乙烯酮
🗣️ 情景例句
A murder occurred last night in this very district.
就在这个区昨晚发生了一起凶杀案。
We don't go dancing very often.
我们不经常跳舞。
Excuse me!
打扰一下。