She gave him a guileless look, but he knew he couldn’t really trust her.
她朝他诚恳地看了一,但是他知道他能真正地信她。
John had a fearsome sincerity.
约翰为人极为诚恳。
It is my earnest wish that you use this money to continue you study of music.
你用这笔钱继续学习音乐是我的诚恳愿望。
We should not insult them, take away their personal effects or try to exact recantations from them, but without exception should treat them sincerely and kindly.