flippantly

" 道歉时候，别轻浮地说：“那对不起哈”，要用严正口气：“我非常抱歉。”

Never apologize by flippantly saying, "sorry about that." Say in a sincere tone, "I'm very sorry.

He answered the reporters’ questions flippantly; this cannot be airily explained to your children.

他轻率地回答了记者问；不能随便说给孩子听。