Kdf
abbr. knocked-down flat （货物）拆散平放
🗣️ 情景例句
Have a good trip.
旅途愉快。
Today is the scholar of yesterday.
今天是昨天的学者。
Before you leave the lab, make sure the electricity is turned off and the windows are shut.
你们离开实验室前，务必要关上电源，关好窗户。