Oxamide
草酰胺, 乙二酰二胺
🗣️ 情景例句
Clean? You call this clean?
干净这样算干净？
This is my second year of college, I'm a sophomore.
这是我上大学的第二年，我是二年级学生。
I thought I put it in my coat, but it isn't here!
我想我把它放在大衣里，可现在不见了！