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Mirror
Have you ever Wondered how you can see yourself in a mirror?Most mirrors are glass,and they have smooth surface that can reflect,or give back light.When light strikes a mirror in a certain pattern,the light is reflected back in the same pattern.So when you stand in front of a mirror,your image is reflected back for you to see.
Long ago,people used polished brass,silver and gold to see their reflection.But for almost four hundred years,people have made mirrors from plate glass.The front of the glass is polished.The back is painted with a substance that reflects light.The glass is then cut into many sizes to be used as mirrors.A flat mirror reflects a correct image.If the mirror is wavy or curved,the image will look odd.This is why people look so funny in the wavy mirrors used in carnivals.
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镜子
你想过你怎么在镜子里看到自己吗?大多数镜子是玻璃做的，表面光滑，可以反射光线。当光线以一定角度照在镜子上，会以同样的角度返回，所以当你站在镜子前，你的样子又反射回来，这样你就看见了自己。
以前，人们用光滑的铜、银、金板来看自己，但是在大约4百年前，人们根据厚玻璃板发明了镜子，玻璃前面擦亮，后面涂上了一层反光物质，然后切作各种大小作镜子。平镜子反映真实相貌，如果镜子被做成波浪式或被弯了，会看起来很奇怪，这就是在狂欢节人们使用波浪式镜子如此搞笑的原因。
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