It's difficult to look natural when you're feeling nervous.

当你紧张的时候，就很难显得轻松自然。

《牛津词典》

Unlike fossil fuels, it is difficult to look for alternatives: people have to eat.

化石燃料可以有替代能源，可食物是没有替代品的。

youdao

As a foodie, I will tell that it's difficult to look at food as fuel, rather than entertainment.

作为一名美食家，我会说，比起把食物当成一种乐趣，更难把食物当成能量。

youdao

I worked on specifically, I looked at -and this is also the reason why it's difficult to say what is a just university, because we didn't just look at Princeton, we didn't just look at Ivy League Schools or at least private institutions.

我专门研究的是,顺便，这也是为什么,为公正的大学下定义很难得原因，因为我们研究的不仅仅是普林斯顿大学，也不仅仅是常青藤学校,至少不是私人学校。

普林斯顿公开课 - 人性课程节选

The phenomena is known as "emotional contagion, where if you're facing somebody, for instance, and they're they look at you in a face of absolute rage, it is very difficult to just sit there without your own face molding in accord to their own.

这种现象就是情绪感染，例如，你看着某人，他们怒气冲冲看着你，你很难只是坐在那里,不去回应他们的愤怒。

耶鲁公开课 - 心理学导论课程节选

However, it is difficult to look your monthly statements and see the decline.

FORBES: Weathering a Financial Storm

Still, it is difficult to look out at this city right now and see how 26.2 miles Sunday makes a tremendous amount of sense.

WSJ: Jason Gay: Are We Really Going To Run This Race?

That leads to the second reason the word is counter-productive: it makes it more difficult to look fairly at who might actually be causing the run-up in prices.

FORBES: A Challenge: Stop Saying 'Speculators'