Crime is an increasingly serious problem in Russian society.

犯罪猖獗是俄罗斯社会面临的一个日益严重的问题。

The government still face very serious difficulties.

政府仍然面临着非常严峻的困难。

Doctors said his condition was serious but stable.

医生说他的病情很严重，但还算稳定。

I regard this as a serious matter.

我认为这件事很重要。

Don't laugh boy. This is serious.

小伙子，别笑，这很严肃。

...the serious business of running the country.

治国的大事

My parents never really faced up to my drug use in any serious way.

我父母从未认真地正视过我的吸毒问题。

It was a question which deserved serious consideration.

这是一个值得认真考虑的问题。

...serious discussions.

严肃的讨论

...serious classical music.

严肃的古典音乐

There is no point reviewing a blockbuster as you might review a serious novel.

为一部大片写影评时，没必要像为一部严肃小说写书评那样认真谨慎。

You really are serious about this, aren't you?. [+ about]

你这话的确是发自内心的，是不是？

I hope you're not serious.

我希望你不是认真的。

He's quite a serious person.

他是一个非常一本正经的人。

She looked at me with big, serious eyes.

她睁大眼睛若有所思地看着我。

He started earning serious money only in the sixties.

他在 60 年代才开始挣大钱。