I may say in all sincerity that you've been my most loyal friend.

我可以极其真诚地说,你一直是我最忠实的朋友.

辞典例句

I helped you in all sincerity.

我是一片诚心帮助你.

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Bassanio begged the young judge in all sincerity.

巴塞尼奥至诚地恳求年轻法官道.

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He pledged in all sincerity and seriousness that he would always remain faithful.

他信誓旦旦地保证,他将永远忠贞不渝.

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Later, people use it to describe people who invite someone in all sincerity and eagerness.

后来, 人们就用这个成语来表示诚心诚意一再邀请.

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