结绳术

例句：

1. 1. In ancient times, people used knotted ropes to mark boundaries and keep track of their belongings.
   古代，人们用系绳标记边界和保管物品。
2. 2. The story of the first settlers in this region was passed down through the use of knotted ropes.
   该地区的第一批定居者的故事是通过使用系绳传承下来的。
3. 3. In modern times, some people still use knotted ropes as a way to remember important dates or events.
   现代，有些人仍然使用系绳作为记住重要日期或事件的方法。