Monounsaturated
a. 单不饱和的
🗣️ 情景例句
I can't build a fire by rubbing two pieces of wood together.
我总不能靠着磨擦两片木柴来取火吧。
When guns speak it is too late to argue.
待到炮声响，辩论已莫及。
Not all sounds made by animals serve as language.
动物发出的声音不都是用作语言交际。