All along, the string was tied to the axle, causing the spinning disks to return up the cord immediately after they hit bottom.

一直以来，溜溜球的绳子都是拴在轴上，让球盘旋转到底时可立即反转向上爬。

youdao

All along, the string was tied to the axle, causing the spinning disks to return up the cord immediately after they hit bottom.

一直以来，溜溜球的绳子都是拴在轴上，让球盘旋转到底时可立即反转向上爬。

youdao