“Do it, ” said the stranger standing nearest to Harry, a big, rangy man with matted grey hair and whiskers, whose black Death Eater's robes looked uncomfortably tight.

“动手吧。”站得离哈利最近的生人说，他四肢修长，灰色的头发和络腮胡都纽结在一起，件食死徒的黑袍很不紧紧勒在身上。

I think I spoke, I was speaking about something that's known as the Knuth-Bendix algorithm now, but he gave a famous talk about knots.

我当时在谈论一现在被称为Knuth-Bendix算法的东西，但他做了一关于纽结的著名演讲。