1966年8月5日，一张名为“旋转者”（Revolver）的唱片横空出世，其中对卡带磁轨（Tape Loop）和逆向录音（Back Recording）的运用成为了它最重要的实验性贡献之一。
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例如，无论一个舞者多么想要跳离地板，然后开始旋转，角动量守恒定律绝对阻止这样的动作。
For example, no matter how much a dancer wishes to leap off the floor and then start turning, the law of conservation of angular momentum absolutely prevents such a movement.
可以看出，这个效应是非常明显的：能够观察到隐藏魔眼的观察者，其倒转舞者旋转方向的可能性要大大高于后者。
The effect is quite dramatic: people who can perceive the hidden Magic Eye image were significantly more likely to be able to reverse the dancer.
如果还想换其他款式的服装，购物者无需走动，只要旋转屏幕上的按钮即可。
What’s more, if the fashionistas want to switch clothes, without any moving, they only need to swish their hand on virtual buttons on the screen.
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