into the blue
无影无踪
A:How are you going all these days?
A:这些天过得怎么样?
B:Fine, thanks.
B:还行，谢谢。
A:But you look depressed.
A:可你看上去情绪不高。
B:I have some problem with my work.
B：工作上有点问题。
A:Is it serious?
A：严重吗?
B:I canI'm solve it, thanks.
B：我可以解决，谢谢。
A:How about your famoly?
A:家庭还好吧?
B:Everything is OK. And as soon as I see my son at home, all my worries vanish into the blue.
B：一切都好，我回家一见儿子，所有的忧虑就消失得无影无踪了。