" That is the difficulty, " said Mother.

“这就是困难所，”母亲说。

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

多说一句，这就是表演的困难所。

" It is from that our difficulty will come" .

“这就是我们的困难所” 。

No, no—that is just the difficulty.

不，不，这就是困难所。

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

我明白了那时我感到非常混乱的困难所，那就是白人拥有的人的权力。

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

“这就是困难所。如果我们能让自己出名， 人们可能会雇用我们为他们犯罪” 。

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，这才是真正的困难所，因为很多情况下，它们晚上发出的叫声并不经常白天发出。

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，华盛顿大学的研究人员建立了一个巨大的人脸数据库，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。

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个区别：年轻人的前面有辉煌的未来，老年人灿烂的未来却已它们身后。这也许就是困难之所。