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小学科学知识趣味学45：日历上的月亮
春天来了，安娜的生日也到了，姐姐艾莎给她准备了漂亮的蛋糕和快乐的生日派对。安娜沿着红线一路找到了各种各样的礼物，有宝石手镯，漂亮的水晶球，城堡玩具，还有向日葵花束，真是幸福的一天！ 更多知识内容，欢迎关注微信公众号 科学嬉游记
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