Semigroup
[计] 半群
🗣️ 情景例句
Yes.
是的。
I used to start working at 9:00 o'clock every day.
我过去常在9:00点钟开始每天工作。
'Do you call that a hat?' I said to my wife.
“你把那个叫帽子吗？”我对妻子说。