Combinatorics
n. 组合学,组合数学
🗣️ 情景例句
He will say so, and you may disagree with him too - politely, of course!
你也可能会不同意他的看法——当然，你应该礼貌地告诉他。
One half of the world does not know how the other half lives.
贫富不相知。
6-7-double 8-3-4.Right.
6-7，两个8，3-4。好的。