Cnf
abbr. 合取范式（conjunctive normal form）；成本加运费（cost and freight, 等于CFR）
🗣️ 情景例句
The school was attended almost entirely by local children.
上这所学校念书的几乎全是当地的孩子。
The crow thinks his own bird fairest.
乌鸦总以为自己的雏鸟最美。
I once spend an uncomfortable weekend which I shall never forget at his house.
有一次，我在他家里度周末，过得很不愉快。这事我永远不会忘记。