18 年前
视频简介
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...。无保险的病人、贪婪的保险公司、无情的医疗机构、精神压力过的医生，在这些因素的影响下，卫生保健服务系统正处于彻底崩溃的边缘...。
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