Kent think he knows why: Perhaps only the wiliest of alien species survive the interstellar version of evolution.
肯特认为他找到了答案：或许只有最为狡诈的外星种族才能挺过从大陆文明向太空文明过渡的挑战。
Sigourney Weaver, in an evolution of her role as Ripley in 1979's Alien, plays the gruff scientist who runs the avatar program.
西格妮韦弗，在1979年的电影《外星人》Ripley的扮演人，这次扮演的是一位负责运行程序的态度生硬的科学家。
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