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Massive machines require engineering extremes. The massive man-made satellite, commonly known as the International Space Station, hurtling around the Earth at 27,600 km an hour, has been a temporary home for humans for the last 20 years. The biggest land vehicle on earth, a bucket excavator titled Bagger 293, that can move 240,000 cubic meters of dirt each day. Innovation has a...。聪明的史宾格，呆萌的拉布拉多，矫健的哈士奇，憨态可掬的哈巴狗，每只狗狗都能融化你的心。狗狗如何看待世界，又是如何看待我们？它们有什么不为人知的特殊能力？一切尽在《萌犬秘闻》。。