Nineteen years later, Su Wu was finally released. When he returned to his native land, his hair and beard had turned completely white.

十九年以后，苏武终于回到了汉朝，这时他的胡须头发全都白了。他坚贞不屈的精神却被后代所传颂。

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The sky a ears blue to us on a clear day, because the atoms of nitrogen and oxygen in the atmo here separate the su white light into its many colors, and scatter them throughout the atmo here.

晴天，我们看天空是蓝色的，因为大气中氮原子和氧原子将mbsky 蓝色天空太阳的白光分解成许多种颜色，分散在大气层中。

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