Guilin water winds bend, on the bottom, in trip in the future I will take you on a boat to see guilin is the most beautiful one in the river, li river.
桂林水风弯曲，在底部，在未来的旅行，我将带你乘船看到桂林是最美丽的一条河，澧。
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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