xuexiao:The sky is blue, please deduce "Avogadro Constant".

Why the sky is blue? The sky is blue, please deduce "Avogadro Constant". the sky blue theme the blue sky The sky is blue.There isn't any rain. The children are habing a picnic. The weather is _________ 翻译英语句子"why is the sky a blue color?" looking at the moon through a clear blue sky The sky blue eheme是什么程度有没有用 Till one is blue in the face Till one is blue in the face