10 年前
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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...。多年来，以大熊猫、朱鹮、东北虎等为代表的“动物外交官”在走出国门的过程中，不断增进着中国和世界的友谊。许多国际友人也不禁好奇：中国的“明星动物”所栖息的土地，又是怎样一番景象呢？。
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