论文部分内容阅读
作为地球上越来越珍贵的日用品,水在太空中一直都是无价的,但“无价”只是一种修辞,水在太空中其实是有价的,而且非常昂贵,仅将1加仑水发射到低地球轨道就需花费8.3万美元。尽管NASA的创新技术已使宇航员可利用其汗水和尿液来获得饮用水,未来人们或许还可从火星的地下冰河中提取
As an increasingly precious commodity on Earth, water has been invaluable in space, but “priceless ” is just a rhetoric that water is actually valuable in space and is very expensive, only 1 gallon It costs about $ 83,000 to launch water into low Earth orbit. Although NASA’s innovative technology has enabled astronauts to use their sweat and urine to get access to drinking water, in the future people may also be able to extract from Mars’ underground glaciers