SITUATION / PROBLEM 情况/问题, a serious situation, problem, accident etc is extremely bad or dangerous

〔情况、问题、事故等〕严重的:

the serious problem of unemployment

严重的失业问题

Luckily, the damage was not serious.

还好，损坏不算严重。

a serious accident on the freeway

高速公路上的一起严重事故

Oil spills pose a serious threat to marine life.

原油泄漏对海洋生物构成严重的威胁。

Serious crimes have increased dramatically.

重大犯罪活动大幅度增加了。

be serious

IMPORTANT 重要的, important and needing a lot of thought or attention

重要的，重大的; 严肃的:

This is a very serious matter .

这是件很重要的事情。

the serious business of earning a living

谋生这种重要的事情

Be quiet, Jim. This is serious.

安静，吉姆，这事儿很重要。

a serious article

一篇重要的文章

I'll give your suggestion serious consideration.

对你的建议我会认真考虑。

LARGE AMOUNT 大量, [only before noun] [informal] used to emphasize that you are talking about a large amount of something

大量的:

The President was in serious trouble .

总统遇到大麻烦了。

In industry, you can earn serious money .

在制造行业能赚到大钱。

ROMANTIC RELATIONSHIP 恋爱关系, a serious romantic relationship is likely to continue for a long time

认真的:

It's serious – they've been seeing each other for six months.

这是认真的，他们约会已经有六个月了。

Are you really serious about her?

你对她的确是认真的吗？

PERSON 人, someone who is serious is very quiet and sensible

严肃的

SPORT / ACTIVITY 体育运动/活动, [only before noun] very interested in an activity or subject, and spending a lot of time doing it

极感兴趣的，热衷的:

He's become a serious golfer since he retired.

他自从退休以后就成了热衷于打高尔夫球的人。

Chris is a serious photographer.

克里斯是个热衷于摄影的人。

VERY GOOD 非常好的, [only before noun] [informal] very good and often expensive

很好的，质优价高的:

He's got a serious car!

他有一辆很棒的汽车！

WORRIED / UNHAPPY 忧虑的/不愉快的, slightly worried or unhappy

担心的，不愉快的:

You look serious. What's wrong?

你显得心事重重的，出了什么事？