Combinatorics
n. 组合学,组合数学
🗣️ 情景例句
Wouldn't it be nice if we could skip the examinations
要是我们可以略过考试 那岂不是很好
You had it coming!
活该！
I'll have to stay at the office.I don't know when I'll finish.
我不得不留在办公室，不知道什么时候才能结束。