She asked me to be serious – said it put her off if I laughed.

她要我严肃一点–说如果我大笑会让她分心。

《柯林斯英汉双解大词典》

Twitter is, after all, supposed to be serious.

毕竟，Twitter只是被假定成很严肃的东西而已。

youdao

Officials said the injury does not appear to be serious.

有官员表示，初步诊断显示其伤势并不严重。

youdao

"The blunt reality is that there will be dwindling appetite and patience in the US Congress -- and in the American body politic writ large -- to expend increasingly precious funds on behalf of nations that are apparently unwilling to devote the necessary resources or make the necessary changes to be serious and capable partners in their own defense."

VOA: special.2011.06.11

However, if you do happen to be an English or a literature major or someone who's just very serious about reading at that level, you will find plenty to chew on here.

然而，如果你刚好主修英语或是文学,或是任何以主修的水平很认真阅读的人，你将会在这里发现很多值得咀嚼的东西。

耶鲁公开课 - 1945年后的美国小说课程节选

And off he goes, and he sulks in his tent for the next nine books, and this turns out to be a serious problem for them.

然后他真就走了,他回到自己的帐篷收拾东西,他这一走 问题就大了

耶鲁公开课 - 古希腊历史简介课程节选

He was taken to hospital but his injuries are not believed to be serious.

BBC: Two men die during police car chase in South Tottenham

If they are serious about tackling youth unemployment, they need to be serious about funding colleges.

BBC: Protesters in march against cuts in Glasgow

The way to do that is to be serious about border security -- and we have been.

WHITEHOUSE: Open for Questions with President Obama