Combinatorial mathematics
[计] 组合数学
🧩 词语组成解析
[计] 组合的
🗣️ 情景例句
Nice to meet you, Susan.
很高兴见到 Susan。
There is a crook(=affliction,trial) in the lot of every one.
人生总有倒楣事；人生总有不如意处。
Yes, I slept very well all night, thanks.
好的，我一个晚上都睡得很踏实，谢谢。