His illness is not at all serious.

他的病很轻。

《新英汉大辞典》

These are all serious problems.

这些问题都很严重。

youdao

So they walk around all serious, which in all honesty, is foolish!

所以他们在生活中始终一脸严肃，而这在本质上才是真正的愚笨。

youdao

Dangerous mountain paths. And they all risk developing a serious health disorder caused by lack of oxygen.

VOA: special.2010.06.30

The first creation story doesn't really contain puns and wordplays, it's a little bit serious. The second creation story is full of them: there are all sorts of little ironies and puns in the Hebrew.

第一个创世纪故事中很少有双关语和文字游戏，有几分严肃，第二个故事却充满了这些：,希伯来语中有许多反讽和双关。

耶鲁公开课 - 旧约导论课程节选

All of your friends wanna go see a play that's very serious.

你所有的朋友都想去看一出很严肃的正剧。

I feel like 课堂 - SpeakingMax英语口语达人

They are beyond any government's control and, by all serious predictions, are likely to continue rising.

BBC: Energy policies 'reduce bill rises'

Iraq, meantime, pledged to make "all serious and legitimate" efforts to peacefully resolve the crisis.

CNN: Source: Annan expected to make Baghdad trip

While all serious criminals, the three barely register as footnotes of the financial crisis.

FORBES: Primary Prosecutors of Mortgage Fraud? Pension Funds And Plaintiffs' Lawyers