So far, machines have a pretty hard time emulating creativity, arbitrary enough not to be predicted by a computer, and yet more than simple randomness.

到目前为止，机器在模仿创造力方面有相当困难的时间，它们的随机性足以让计算机无法预测，但也不仅仅是简单的随机性。

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It's hard to recommend how to invest at this time without knowing how much capital you have.

在这个时候，如果你不知道自己有多少资本，就很难向别人推荐如何投资。

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If we want to reap a harvest, we have to make the best of time and work hard.

如果我们想要有所收获的话，就必须善用时间、努力工作。

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Mr. Carl Icahn: Well, it's hard to recommend how to invest at this time without knowing how much capital you have.

伊坎先生：嗯，在当今形势下,如果不知道你有多少资本,那就很难给你投资建议。

耶鲁公开课 - 金融市场课程节选

We are basically committed to each other for sex but it's very hard to make those relationships last a long time because we might not have anything in common, we might not share anything with each other, we might not trust each other, we are not particularly bonded to each other.

我们基本上只有激情的承诺,长时间维持这种关系很困难,因为可能双方没有任何共同点，没有共享的东西，我们可能互不信任，不是特别亲近。

耶鲁公开课 - 心理学导论课程节选

This belief rests on two (contradictory) pillars: first, that parasites adapted to pigs would have a hard time adapting to humans, and, second, that because pigs and people have lived together for so long, any parasites likely to switch have already done so.

ECONOMIST: Pigged out

Because when I was little, I used to have a hard time going to sleep on Christmas Eve, too.

WHITEHOUSE: The White House

Anytime you use unconventional conventions to tell a story, particularly at a time when pop culture is so self-reflective and it's difficult to find a unique voice, I think you are going to have a hard time selling it to people.

CNN: He's 'Jesus' Son'