Polystep reaction
[化] 多步反应
🧩 词语组成解析
🗣️ 情景例句
Grandpa,
爷爷，
I told him that if he tried to remove the fence it would be over my dead body.
我告诉他，除非我死了不然他从从休想拆掉这道篱笆。
Did he telephone again last night?
他昨夜里又打电话了吗？