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长长恐龙，短短恐龙-幼儿睡前有声故事
《长长恐龙，短短恐龙》帮助孩子理解长度的概念，用眼睛简单的估测日常生活中某物体的长度是长还是短。通过喜欢恐龙的孩子说想要在家中养恐龙而展开的家庭故事，培养孩子对长度的认知。
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