Combinatorial problem
[计] 组合问题
🧩 词语组成解析
[计] 组合的
🗣️ 情景例句
I've got three days off next week.
下星期我有三天假。
I understand all your prices are on CIF basis. We'd rather have you quote us FOB prices.
得知你方报的都是到岸价，希望能给我们报船上交货价。
I'm reading a book.
我在读书。