That's the thing that's hard, by the way.

多说一句，就是表演的困难所在。

To begin to figure out how computers are struggling, researchers at the University of Washington created a massive database of faces — they call it MegaFace — and tested a variety of facial-recognition algorithms as they scaled up in complexity.

为了开始了解计算机的困难所在，华盛顿学的研究人员建立了一的人脸数据库，他们称之为 “MegaFace”，而且随着复杂度的增加，他么测试了各种人脸识别算法。

" That is the difficulty, " said Mother.

“就是困难所在，”母说。

I now understood what had been to me a most perplexing difficulty-namely the white man's power to enslave the black man.

我现在明白了那时令我感到非常混乱的困难所在，那就是白人拥有的奴役黑人的权。

This is really what makes spelling difficult.

正是拼写困难之所在。

And the thing is, this is where it's hard.

而问题在于，正是困难所在。

This is what all this difficulty is about.

就是所有些困难的意义所在。

And that's where the difficulty comes in.

就是困难所在。

Well, there are gonna be things that don't work, and that's the difficult thing, right?

确实，有些方法可能行不通，就是困难所在，对吧？

" It is from that our difficulty will come" .

“就是我们的困难所在” 。

" That's the difficulty. If we could make ourselves known, people might hire us to commit crimes for them" .

“就是困难所在。如果我们能让自己出名， 人们可能会雇用我们为他们犯罪” 。

95. There is only one difference between an old man and a young one: the young man has a glorious future before him and old one has a splendid future behind him: and maybe that is where the rub is.

95。老人和年轻人之间只有一区别：年轻人的前面有辉煌的未来，老年人灿烂的未来却已在它们身后。也许就是困难之所在。

I, on the contrary, became more cheerful, and took fresh courage: these last words gave me an insight as to where the difficulty lay; and as it was no difficulty with me, I felt quite relieved from my previous embarrassment.

相反，我变得更加开朗，并获得了新的勇气：些最后的话使我明白了困难所在;由于对我来说并不困难，我从先前的尴尬中感到相当轻松。

But when it comes down to the songbirds, that's where the real difficulty lay, because the calls that they're giving at night are not, in many cases, not frequently given during the day.

埃文斯：但是当谈到鸣禽时，才是真正的困难所在，因为在很多情况下，它们在晚上发出的叫声并不经常在白天发出。

And that's where it is hard.

那就是困难所在。

So I would say there are many challenges, and that's kind of what's hard about it.

因此，我认为存在许多挑战，也是其困难所在。