Interval integral
[计] 区间积分
🧩 词语组成解析
🗣️ 情景例句
They've stood by me through all this.
他们一直支持我做这件事。
No, I'm sorry, sir. We don't accept checks.
先生，对不起，我们不接受支票。
I have some difficulty in pronouncing some of the words in English.
我有些英语单词发音不好。