Picture what it would be like to roll a bowling ball onto the two-dimensional surface of a trampoline.

想像下将一个保龄球在一个二维的弹簧垫子表面滚动的情形。

youdao

Picture what it would be like to roll a bowling ball onto the two-dimensional surface of a trampoline.

想像下将一个保龄球在一个二维的弹簧垫子表面滚动的情形。

youdao