Combinatorics
n. 组合学,组合数学
🗣️ 情景例句
Can't you do something about it?
你就不能想点办法吗？
Better some of a pudding than none of a pie.
聊胜于无。
Please sign a copy of our Sales Contract No.156 enclosed here in duplicate and return to us for our file.
请会签第156号销售合同一式两份中的一份，将它寄回我方存档。