Backstopping
支援（backstop的现在分词）
🗣️ 情景例句
without studying these building plans more carefully.
在没有仔细研究这些建筑图的情况下。
I would like to go to town, Do you want to go, too?
我要去城里，你是不是也要去？
He was a famous professor of physics.
他是一位著名的物理教授。