杭州交通信息网黑天鹅未删减版 百度云:短文翻译
来源：百度文库 编辑：杭州交通信息网 时间：2024/05/04 13:42:30
Take any long piece of paper. Now glue the ends of the paper together. You have made a ring. Take a second long of paper, twist the paper once and goue the ends together. Now you have made a Mobius band . For people studying math,this band is uncommon.