Dnf
abbr. 未完成（did not finish）
🗣️ 情景例句
History repeats itself.
历史往往会重演。
Who said that?
谁说的？
Well, we listened to lectures about pollution, agriculture, nuclear waste, radiation and so on.
噢，我们听取有关污染、农业、核废料、辐射等讲座。