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当人们对邮票赞不绝口,惊叹方寸世界的艺术魅力时,你是否知道在这一枚枚小小邮票的背后,有许多鲜为人知的故事?
When people praise the stamps and marvel at the artistic charm of the world, do you know that there are many little-known stories behind this single little stamp?