Levulinate
乙酰丙酸
🗣️ 情景例句
When I watch sad movies I get really depressed.
当我看悲伤的电影时，我常常很难过。
I know the boy whose father is a guide.
我知道那个男孩的父亲是导游。
Do you want to speak to her?
您要同她谈话吗？