Combinatorial mathematics
[计] 组合数学
🧩 词语组成解析
[计] 组合的
🗣️ 情景例句
Don't cross that bridge till you come to it.
没到河边，先别操心怎么过桥。
I am very much to blame.
都怪我不好。
and should not be put in drinks unless it is known to be safe.
只有知道冰块安全时才能加入饮料。