Gray isn't just for hair. Some people develop a gray ring around the edge of the cornea.
不只是头发会变成灰色，有些人眼角膜的边缘也会变成灰色。
Some people think that a big shock or trauma can turn a person's hair white or gray overnight, but scientists don't really believe that this happens.
一些人想一个大的冲击或者震惊可以使一个人的头发在一夜之间变白或灰，但是科学家不真的相信这发生。
When I say that I'm old, however, I don't mean my hair is gray and that I need a cane to walk, I just mean that for the first time in my life, I'm seeing some negative effects of aging.
当我说我老了，然而，我并不是说我的头发是灰色的，我需要一根手杖走路，我只是说：在我生命里的第一次，我看到一些负面效应等。
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