Hemigroup
[计] 半群
🗣️ 情景例句
She sure was.
她小时候很逗人喜爱。
Sometimes it's nice just to sit around and do nothing.
偶尔坐着无所事事，也算是赏心乐事。
When he went outside half an hour later, he was astonished to find the little black lamb was almost white.
半小时后，当他从屋里出来时，他惊奇地发现小黑羔羊全身几乎都变成白色。