Semigroup
[计] 半群
🗣️ 情景例句
My little boy is having a school play tonight, I don't want to miss it.
我的小儿子今晚会参加学校的戏剧表演，我不想错过了。
What do you plan to do this Friday?
明天你打算干什么？
I repeated my question several times and at last he understood.
我把问话重复了很多遍。他终于听懂了。