Cocatalyst
助催化剂
🗣️ 情景例句
I cannot forgive myself for not seeing my mother when she was sick in bed.
母亲病的时候我没能去看她，为这件事我永远不能原谅我自己。
He is distinguished as an economist.
他是一名著名的经济学家。
Excuse me. Where's the toilet, please?
请问洗手间在哪？