You look very serious about something.

你似乎有很严重的事。

youdao

You look pretty serious about something. What happened to you?

你似乎有很严重的事，你发生什么事了？

youdao

Getting too serious about something will increase your stress levels.

太在乎一些事情会增加你的紧张感。

youdao

I had just gotten over a serious illness that I won't bother to talk about except that it had something to do with the miserably weary splitting up and my feeling that everything was dead.

我刚熬过一场重大疾病，具体就不说了,只是这与我和妻子不幸的分离有些关系,我感觉万物都没有了生机。

耶鲁公开课 - 1945年后的美国小说课程节选

And if the Republican leadership is prepared to get serious about doing something for families that are hurting out there, I would love to talk to them.

WHITEHOUSE: President Obama News Conference

And I would note that enthusiasm among Latino voters has increased over the past several weeks, and I think that the President -- the President is serious about doing something about immigration reform.

WHITEHOUSE: Press Briefing

We'll get a chance to see whether working together is something that people are serious about doing or whether it's something that a pollster told them to say.

WHITEHOUSE: Press Briefing