Bireactant
双元推进剂, 二元反应物, 双反应物
🗣️ 情景例句
No, I'm not.
不，我不觉得。
While you were writing letters,I was reading a book.
当你正在写信时，我正在读一本书。
He has asked to be introduced to the pianist.
他要求会见这位钢琴家。