Definite integral
[计] 定积分
🧩 词语组成解析
🗣️ 情景例句
My mother doesn't mind who comes to stay, she's very easy-going.
我母亲不在乎有什么人来往，她十分随和。
I don't know what I should have done without your help.
要不是您的帮助，我真不知道该怎么办。
The conference was very well organized. Everything began and finished on time.
会议安排的很好。开始和结束都准时。