关于space600的作文知识

Theearthmovesroundthesun,andthemoonmovesroundtheourpartoftheearthturnstothesun,itisday.Whenourpartoftheearthturnsawayfromthesun,itisnight.Thesunisbiggerthanthesometimesthemoonlooksbiggerthanthesun,bec...