Cnf
abbr. 合取范式（conjunctive normal form）；成本加运费（cost and freight, 等于CFR）
🗣️ 情景例句
I found it.
我发现了它。
What do you think about it?
你对此怎么看？
The planes had been planting seed for nearly a month when it began to rain.
飞机撒播近一个月后，开始下起雨来。