通过每次在当秋千时的最高点伸直你的腿可以使你全身的质心升高，这样就能有效地增大你晃动时的高度。

By raising your legs at the top of each swing, you can raise the overall center of mass of your body, effectively raising the height of your swing.

youdao

通过每次在当秋千时的最高点伸直你的腿可以使你全身的质心升高，这样就能有效地增大你晃动时的高度。

By raising your legs at the top of each swing, you can raise the overall center of mass of your body, effectively raising the height of your swing.

youdao