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It Must Be Crowded A teacher is telling his students, The moon is very large. Several millions people can live there. And a boy laughs and says, It must get crowded when its a crescent moon. 一定很拥挤 一位告诉学生：月亮非常大，上面能住几百人。 一个男孩笑着说：当月亮变成月牙的时候，住在上面的人该多拥挤啊! | 
