This is the moment a SpaceX capsule left the International Space Station on an emergency return flight to Earth prompted by a medical issue afflicting one of the astronauts. It is Nasa’s first medical evacuation, with the mission being cut a month short. Onboard were American astronauts Mike Fincke and Zena Cardman, a Russian cosmonaut Oleg Platonov, and a Japanese astronaut Kimiya Yui. Computer modelling predicted a medical evacuation from the space station every three years but Nasa has not had one before in its 65 years of human spaceflight
这是复杂的过程，不能急，但最基础的礼貌用语，规矩还是要告诉她在什么情况下要说。，更多细节参见谷歌浏览器【最新下载地址】
/srv → /var/srv，这一点在夫子中也有详细论述
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