Cnf
abbr. 合取范式（conjunctive normal form）；成本加运费（cost and freight, 等于CFR）
🗣️ 情景例句
We did?
我们忘了吗？
Every tree is known by its own fruit.
观其言行，知其为人。
No, I'm just looking at the menu. Are you hungry?
还没有，我正在看菜单。你饿了吧？