with the flexibility and complexity that entails.
前苹果首席设计师乔纳森 · 艾维：创造美的事物，详情可参考爱思助手下载最新版本
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The ISS is far bigger than either the Salyuts or Skylab. In an uncontrolled deorbit, pieces of debris “up to car and train size,” say experts on the official ISS space station advisory committee, will rain down from the sky. NASA confirms this would pose “a significant risk to the public worldwide.”