Well, not always serious problems, but certainly negative situations.

不总针严肃的问题，但肯定用于负面的情况。

But, we can also use it for not-so-serious situations — like more informal.

但，们也可以在不那么严肃的情况下使用它，比如更加非正式的情况。

For example, to monkey around means to do things that are not useful or serious.

例如，“to monkey around”指做无用或不严肃的事情。

So let's try a few less formal, less serious expressions.

那们尝试一些不那么正式的，不那么严肃的表达吧。

It doesn't have to be about a really serious decision.

不一定非常严肃的决定。

And comedies about unserious middle class and lower class people falling in love.

喜剧必须关于不严肃的中产阶级和下层阶级坠入爱河。

And... - Those are, yeah, those are activities that aren't serious.

然后… … - ，，些不严肃的活动。

" It was the unseriousness, not to say the sheer idiocy, of the media."

“即使不说完全的蠢事，也说明了媒体的不严肃。”

But Trump repeatedly lied, spread baseless conspiracy theories and made a number of unserious or incoherent policy proposals.

但特朗普一再撒谎，散布毫无根据的阴谋论，并提出了一些不严肃或不连贯的政策建议。

Now makeup is often dismissed as frivolous but during the war, it took on extra importance in terms of morale.

在现代化妆经常被认为不严肃的，但在战争期间，化妆在士气方面变得格外重要。

A lesser form or something not as serious we have called socialism.

一种较次要的形式或不那么严肃的东西， 们称之为社会主义。

And it's not meant to be played like a serious instrument.

而且它并不意味着像严肃的乐器一样演奏。

Now let's turn to a " lighter, " more happy or less serious topic.

现在们转向一个“轻松”、更快乐或不那么严肃的话题。

To his critics, this did not sound like serious history.

他的批评者来说，这听起来不像严肃的历史。

Well, there were the sort of the serious ones and the unserious ones.

嗯，有严肃的和不严肃的。

There is no perspective of a serious negotiation.

根本不存在进行严肃谈判的前景。

He doesn't like serious films very much, and likes to have a laugh, too.

他不太喜欢严肃的电影，也喜欢开怀大笑。

Ask David to explain why American style libertarianism is an unserious philosophy.

请大卫解释为什么美式自由主义一种不严肃的哲学。

I am made unhappy when I think you don't care about such serious matters.

当认为你不关心这些严肃的事情时， 感到很不高兴。

Can't seriously be talking about me taking one of your kids, can we?

好吧，好吧，这太疯狂了。们不可能在严肃的讨论要带走一个孩子，吗？