Semigroup property
[计] 半群性
🧩 词语组成解析
[计] 半群
🗣️ 情景例句
Never in my life have I seen such a mess!
我这辈子没见过这么乱的地方。
He falls down the stairs.
他从楼梯摔了下来。
But we won't have our big family get-together until Christmas.
但我们要等到圣诞节才会有家庭大团圆。