Perveance
[电] 电子管屏导数
🗣️ 情景例句
We want to keep customers happy.
我们必须让顾客满意。
You cannot have two forenoons in the same day.
一日之中不可能有两个上午。
The woman was a visitor. She did not live in London. She lived in the country.
这老太太是位游客，不住在伦敦。