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。
一名共和党议员信誓旦旦地说：解决方案就是州长辞职。
The solution, one Republican state senator helpfully averred, was for the governor to resign.
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.
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