This is why your bottom moves backwards when you bend over, so that your centre of gravity can still remain over your feet.
这就是为什么你的底部向后移动时，你弯腰时使你的重心仍在你的脚下。
This is why your bottom moves backwards when you bend over, so that your centre of gravity can still remain over your feet.
这就是为什么你的底部向后移动时，你弯腰时使你的重心仍在你的脚下。
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