Backstopping
支援（backstop的现在分词）
🗣️ 情景例句
That's Mr. Steven Lu, from Taipei?
您是Steven Lu，从台北来的？
The first step to virtue is to abstrain from vice.
不作恶是走向美德的第一步。
I don't like what you are saying.
我不喜欢你说的话。