双子宇航员研究

Scientists Study Twin Astronauts

斯科特·凯利和马克·凯利是一对双胞胎宇航员。斯科特在国际空间站生活了一年,而马克则待在地球。想比较两种环境对人体造成的不同影响,在很多方面都十分相似的双胞胎是最合适的研究对象。美国航空航天局为此开展科研项目,试图了解太空飞行对人体会产生什么影响。每周,兄弟俩都会对身体各方面的机能进行自测。他们还会通过完成智力比赛来测试大脑的认知能力。

Scott and Mark Kelly are twins who both became astronauts(宇航员).Scott lived in the International Space Station(ISS)(国际空间站)for a year.Mark stayed on Earth.The twins are alike in many ways,but they were living in very different places.Scientists at NASA(美国航空航天局)studied Scott in space and Mark on the ground to learn how living in space affects the human body.