A controlled deorbit requires the use of several core systems, including those for communications, power, and avionics. Some of the ISS machinery was not specifically certified to perform in a depressurized environment. (NASA believes that critical systems would remain operable, based on technical analyses, and emphasizes that many of these systems are already used in vacuum.) Another thing to worry about: the ISS losing control over its orientation in space. The spacecraft could start tumbling, flipping the station’s solar arrays away from the sun, taking the primary source of power with it.
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“灵师”回忆，早期的小天才好友圈里，大家围绕人文历史、原生家庭等话题进行交流，纯粹是为了交友分享。但点赞功能推出后，隐形等级制度逐渐形成，点赞数量高的用户开始“歧视”低点赞用户，圈子氛围变得浮躁功利。“大家不再单纯交友，而是互相点赞、功利互换，只为提高名气。”，详情可参考同城约会
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