从某种层面上说，在地板上和在冰面上跳舞的区别就是摩擦力减小。

On one level, the difference between dancing on a floor and skating on ice is the lack of friction.

youdao

从某种层面上说，在地板上和在冰面上跳舞的区别就是摩擦力减小。

On one level, the difference between dancing on a floor and skating on ice is the lack of friction.

youdao