Semigroup property
[计] 半群性
🧩 词语组成解析
[计] 半群
🗣️ 情景例句
I hope you're enjoying your stay here.
我希望你在这里过得愉快。
Rose, let me introduce my friend to you.
罗斯，让我介绍一下我的朋友。
He waited until the volcano became quiet and he was able to return two days later.
他等到火山平静下来，两天以后又返回去。