Difference expression
[计] 差分表示式
🧩 词语组成解析
🗣️ 情景例句
Get this place picked up immediately. do you read me?
马上把这里收拾干净，听明白没有？
Would you hold the line, please, I will find out his number for you.
请你不要挂断，我替你找他的号码。
What is more, this information line operates 24 hours a day.
而且，这种"问讯线路每天工作24小时。