Cnf
abbr. 合取范式（conjunctive normal form）；成本加运费（cost and freight, 等于CFR）
🗣️ 情景例句
Never chew with your mouth open.
嚼东西时别张着嘴。
What time did you get up yesterday morning?
你昨天早上什么时间起床？
'What are you doing?' she asked.
“你在干什么？”她问道。