Stand in front of a mirror.
站到镜子前面去。
Your left hand looks like a right hand in it.
你的左手，在镜里像变成了右手。
But your head stays up, and your feet stay down.
可你的头在上，脚还是在下。
Why does the mirror only flip left and right?
镜子为啥只翻左右，不翻上下呢？
In fact, the mirror does not flip anything.
其实呀，镜子什么也没翻。
You turned yourself around, not the mirror.
是你自己转过身，镜子可没动手。
The little trick is all in your head.
这个小机关，全在你脑子里。
