Sign function
[计] 符号函数
🧩 词语组成解析
🗣️ 情景例句
OK. I'll let you get back to your work.
好，你过去工作吧。
This part of the country is very flat.
这个国家这一部分很平坦。
We offered them food and spoke to them kindly, but they remained motionless.
我们给他们东西吃，客客气气地同他们交谈，但他们却一动也不动。