Monoid
[计] 独异点; 类群
🗣️ 情景例句
Yes, I went to the aerobics class today.
去了啦， 我上了有氧运动课了。
Don't you agree?
你不同意吗？
The order was in good shape when it left out factory.
货离开工厂时都是完好无缺的啊。