Combinatorics
n. 组合学,组合数学
🗣️ 情景例句
in the past few weeks.
在最近几个星期。
This driver cannot driver any farther because there is a man in the manhole.
由于
We've still got a little food and water and maybe by tomorrow morning the weather will have cleared up.
我们还有一点食物和水，也许到明天早上，天就会晴了。”