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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4.存在问题整改不力，多数问题未予整改。
Мощный удар Израиля по Ирану попал на видео09:41，推荐阅读im钱包官方下载获取更多信息
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The plan is to stash away around 400,000 tonnes of CO2 this year, potentially rising to eight million tonnes annually by 2030, the company claims.