1·Tie knots in the ribbons.
在丝带上打结。
2·Of the many puzzles mathematicians ponder, one is new ways to tie knots.
数学家们思考的许多难题之一，就是一种新的打结方法。
3·Description: There are descriptions of how to tie knots and how to clean and care for ties.
介绍多种打领带的方法及面试服装的穿著技巧和建议，并教授如何清洗领带、购买领带等。
4·Jun: I took a climbing class once and learned how to belay and tie knots, but I've never seen anything like this.
小君：我上过一次攀岩课，学会怎么做制绳确保和绑绳结，但是我没看过像这样的。
5·From bizarre antimatter to experiments that tie light up in knots, physics has revealed some spooky sides of our world.
从奇异的反物质到把光捆扎成结的实验，物理学已经揭示了我们世界的一些幽灵般的方面。
6·Tie two knots in the cord outside the hole. Thread the other end of the cord through the second hole. Tie two knots in the cord.
把线穿过一个小孔，在小孔外面打两个结，把线的另一头穿过第二个小孔，也在线上打两个结。
7·Do you know how to tie fishing knots?
你知道怎么打钓鱼的绳结吗？
8·Mary would worry us with a lot of questions and often tie us in knots.
玛丽会用一大堆问题来烦我们，常常把我们也弄糊涂了。