Bireactant
双元推进剂, 二元反应物, 双反应物
🗣️ 情景例句
You haven't changed much in fifty years.
你五十年来没有什么变。
I don't know for sure.
我不能肯定。
That sounds a great idea. Good luck with your trip!
听起来真是个好主意。祝你一路顺风。