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小学科学知识趣味学58：什么是固体
乔治邀请他的好朋友理查德到家里玩，他们用各种玩具分别搭建出了火山、丛林、还有一条河流。就这样，佩奇的卧室被变成了一座漂亮的恐龙乐园，乔治和理查德开心地抱着恐龙玩具在卧室里跳来跳去……
小学科学知识趣味学58/81
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