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World's Biggest Oil Rigs 2018 世界上最大的钻塔
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鲸鱼一心求死，拼命往岸上游，专家剖开肚子后就不淡定了
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史上最大发动机-Biggest Engines In The World
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【纪录片】地球 01 烈火炼狱
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太阳能混合两栖游艇 - Solar Hybrid Amphibious Catamaran Yacht
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晶体管-一项改变世界的发明 Transistors - The Invention That Changed The World
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世界最早,11000年前的远古城市！与月球还有着特殊联系
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万万没想到，我国在喜马拉雅山脉南侧有4座城市，可直插印度腹地
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