Operation definition
[计] 运算定义
🧩 词语组成解析
🗣️ 情景例句
Why are you in such a good mood?
为什么你的心情那么好？
If the customer requests a carrier other than truck, he must bear the additional charge.
如果顾客坚持用卡车以外的运输工具，就必须负担额外费用。
It was my first flight. I was nervous when the plane took off.
我第一次坐飞机，起飞时我有点紧张。