恐怕不是。他们的表情都很严肃。

I am afraid not. They look serious.

youdao

不。他们对待任何规则都很严肃。

No, they take rules of any kind seriously.

youdao

每个人都很严肃。

Everybody is very serious.

youdao

We have no choice but to understand that Milton's mask is serious business The whole production is one of the utmost seriousness.

我们没有选择只能理解《面具》是件很严肃的事,整个演出都是很严肃的事情。

耶鲁公开课 - 弥尔顿课程节选

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