Bireactant
双元推进剂, 二元反应物, 双反应物
🗣️ 情景例句
I need a new toothbrush. My old one's worn out.
我需要一支新牙刷。旧的用坏了。
He that never rode never fell.
不骑马就永不会从马上跌下。
It's quite a nice horse! But please don't play with my chalk.
这匹马相当好看！但请不要玩我的粉笔。