That's what he is worrying about.

那就是他在担心的事。

youdao

He frowns. He is worrying about his boy.

他皱着眉头，因为他在为他的孩子担心。

youdao

He is worrying about the present situation.

他对目前的形势很担忧。

youdao

"A lot of time homeless children's families are in chaos and homework is the last thing that parents want to be worrying about."

VOA: special.2011.01.27

And this is the familiar result from ordinary mechanics, where you're not worrying about something like entropy for a whole collection of particles.

在普通力学中，如果不关注大量粒子的熵，诸如此类的物理量的话,这就是我们通常见到的结果。

麻省理工公开课 - 热力学与动力学课程节选

Socrates instead spends some time worrying about the question: is the soul really like harmony or not?

取而代之的是花时间,研究一个问题：,即灵魂是不是真的像和声一样？

耶鲁公开课 - 死亡课程节选

SASAC, a holding company for the state's shareholdings, is worrying about their future profitability.

ECONOMIST: Life is getting harder for China's phone companies

What is worrying about the latest numbers is that we are seeing them towards the end of a period of strong economic growth and corporate profitability, neither of which is likely to continue.

ECONOMIST: Buttonwood

And what is worrying about the National Audit Office (NAO) report - despite the praise for the good progress that has been made to date - is that there are signs this could be starting to happen.

BBC: Why do the NHS savings matter?