Polystep reaction
[化] 多步反应
🧩 词语组成解析
🗣️ 情景例句
My parents set aside a college savings fund for me.
我的父母为我存了一笔上学的费用。
I ask him to wait a few minutes.
我要求他等几分钟。
He took off the first shoe and threw it on the floor.
他脱下第一只鞋子，把它丢在地板上。