There's been a lot of work done on these over the years, but in fact, it's pretty hard to invent a good hash function. So my advice to you is, if you want to use something was a hash, go to a library. Look up a good hash function.

已经做过了很多的尝试和努力,但是事实是，很难发明出一个好的哈希函数,所以我给你们的建议是,如果你们想使用哈希功能,到函数库中查找一个好的哈希函数。

麻省理工公开课 - 计算机科学及编程导论课程节选

It's hard to explain. I'm not an expert, so I just...

这很难解释。我不是一个专家，所以我只能……

英国的啤酒 - SpeakingMax英语口语达人

It's just very hard. So I think that that's helped a lot.

这很难，所以我觉得这个方法很有用。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

just being able to keep saying from a person's perspective which is very hard to see when you get very tense and very defensive. And it's just so good for me to have have someone like Saed especially with Saed personally, just to have that gate.

就是能够,从一个个人的角度聊问题,而如果你很紧张就很难做到这一点,很有戒备心的时候就很难，所以我能够,有Saed是非？牡？,有这扇门。

普林斯顿公开课 - 人性课程节选

So I think it would be hard to plagiarize

所以我觉得很难抄袭，

抄袭是很严重的问题 - SpeakingMax英语口语达人