Möbius strip
/ˈmɜːbɪəs/noun
- a surface with one continuous side formed by joining the ends of a rectangle after twisting one end through 180°麦比乌斯带（将长方形一端扭转180°和另一端接合所形成的带环）。
词源
early 20th cent.: named after August F. Möbius （1790-1868）, German mathematician.