"Dust!" we replied in unison
"What will happen to the dust?"
"Pollute the air"
"You're just saying the right thing," said the teacher. "In fact, the dust has a more important role. It can make the sun more gentle and make the sky bluer"
How will the air dust become more blue sky to see a teacher? We are puzzled, he said: "these little dust, there is refraction and reflection of the role of the sun, in the process of refraction and reflection, so that the sun has become soft and comfortable. At the same time, these have dust filters and filter it to the sun is red, orange, yellow, green and other strong colors of light, leaving a weak blue, the blue light by the atmosphere in the dust absorption reflection and scattering, so the sky becomes more blue"
The teacher suddenly joked: "if our heart to the sky, so that the dust is not as our shortcomings and deficiencies? But there are shortcomings is not terrible, as long as we use the broad mind to accommodate it, with sun transparent heart to illuminate it, we will become more spirit. Pure and blue"
The sky is blue because of the dust, and through all kinds of dust, I see the beauty of the world
译文：
“有尘埃!”我们齐声回答。
“这些尘埃会导致什么结果呢?”
“污染空气。”
“你们只说对了其一。”老师说，“其实，这些尘埃还有一个更重要的作用，它能使阳光变得更柔和，使天空变得更蔚蓝。”
空中的尘埃怎么会使天空变得更加蔚蓝呢?老师见我们一个个疑惑不解，便说:“这些小小的尘埃，有折射和反射阳光的作用，在折射和反射的过程中，使阳光变得柔和、舒适。同时，这些尘埃还有过滤光的作用，它滤去太阳光中红、橙、黄、绿等较强颜色的光，留下了较弱的蓝光，这些蓝光被大气层中的尘埃吸收反射和散射着，于是，天空变得更加蔚蓝。”
老师突然把话题一转:“如果把我们的心灵比作天空，那么那些飞舞的尘埃不正如我们的缺点和不足吗?但有了缺点并不可怕，只要我们用博大的心胸去容纳它，用阳光般透明的`心灵去照射它，我们精神的天空会变得更加纯净和蔚蓝。”
“天空因尘埃而蔚蓝”，透过形形色色的尘埃，我看到了世界的美丽。
