We realized we had to push certain boundaries and there were a few weeks there that were,I have to say, some of the most hard-core filming experiences I have ever had and it was pretty intense."

VOA: standard.2010.02.27

The last thing I want to say about hashes are that they're actually really hard to create.

最后我想说的是哈希函数非常难以创立,在过去的时间里。

麻省理工公开课 - 计算机科学及编程导论课程节选

And just, it's hard to say, I mean there, there's so many areas.

就是，难说，我的意思是，那里有好多地区。

纽约很棒 - SpeakingMax英语口语达人

They'll say, I usually play for more money and it's hard to concentrate or I'm just screwing around.

他们会说，我玩扑克常常是为了赢更多的钱,但是却难以集中注意力,或者我只是随便玩玩罢了。

耶鲁公开课 - 金融市场课程节选

We are hard-wired to say, "Look. If I'm going to eat a new food and I'm going to get nauseous, " I'm going to avoid that food."

我们深信不疑地说，“如果我吃了一种新食物,感到了恶心，我就不会再吃这种食物了“

耶鲁公开课 - 心理学导论课程节选