打结是日常生活中最常见的现象之一 ,例如系鞋带便要打结 .据说打结在过去曾经有重要用途 ,如我国“上古结绳而治” .据上世纪五十年代作社会调查的人报告 ,我国居住在大山里的独龙族仍用纽结来作一些简单的记事 .纽结这种东西尽管用了几千年 ,但并没有一种科学理论研究它 .在 Knotting is one of the most common phenomena in daily life. For example, tying a shoelace requires knotting. It is said that tying knots used to have important uses in the past, such as our country’s “rule of ancient times tying knots and governing”. According to the 1950s, it was a society. The investigators reported that the Dulong people who live in the mountains in our country still use knots to make some simple notes. Although this kind of thing has been used for thousands of years, there is no scientific theory to study it.