旦旦，汉语词语，拼音是dàn dàn，意思是天天；明亮；诚恳的样子。
misc. day by day
她信誓旦旦地说一定要把此事告到法庭。
零售商都信誓旦旦：谁在他们的商店消费返还款，就给谁大折扣。
Retailers are promising big discounts for Americans who spend the rebates in their shops.
一些人信誓旦旦地说，他们在录音的结尾就听到女人脱口说出“柿子”这个词。
Some people have sworn that they can hear “tomatoes,” for example, blurted out toward the end of the track.
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