It's all about rotational mechanics. When you turn your hands over you're rotating them around their centre point, which is near the middle of your palm.
这是一个力学常识,当你翻转手掌时,手掌是以掌心为中心旋转地。
2
But what of an observer b, placed at the centre of the turntable and rotating with it?
但是对于位于转台中间并和转台一起旋转的观察者B来讲来说又是怎样呢?
3
In the centre of it is a rotating depiction with four sacred birdlike animals depiction around it, which are symbols of the sun.