Combinatorial mathematics
[计] 组合数学
🧩 词语组成解析
[计] 组合的
🗣️ 情景例句
How can anybody get a word in around here?
在这里谁有机会插话呢？
I wrote to him last Friday.
我上个星期五写信给他。
Please give him my regards.
请代我问候他。