Dehn showed how a presentation of the group of a knot can be read off from a projection of the knot into a plane . Dehn指明了一个纽结的群的一种表示如何由该纽结在平面上的一个投影看出。
The crisis, he said, was like a rope with a knot in the middle: the more each side was pulled, the more the knot would tighten . 他说，危机好比一条中间打上结的绳子，两头越拉，绳结越紧。
Individual straws in the foreground were consumed in a creeping movement of ruddy heat, as if they were knots of red worms . 前场的一座座独立的麦草堆被缓缓移动的红色的热流所吞噬，宛如一团团红色的蠕虫。
Hunger came to his stomach; an icy hand reached down his throat and clutched his intestines and tied them into a cold, tight knot that ached . 饥饿降临他的肠胃；一只冰冷的手伸进他的喉咙，攥住他的肠子，把它们结成一个又冷又紧、阵阵作痛的结。
All green on the bomb compartment . - speed 60 knots -炸弹区一切正常-速度60海里
Reduce speed now 250 knots indicated for sequencing 现在减小至250节，为了次序。
Three gordian knots in the western exploitation 西部地区人力资源开发的三大症结
His boat can travel only10 knot per hour 他的船速只能达到10节（时速10海里） 。
