Debris actually pelts the ISS all the time, and noticeable dents and cracks line the exteriors. But should something fully breach the station, cabin atmosphere will seep into the vacuum of space and alarms will go off. Pressure gauges will confirm to astronauts that the station has, almost certainly, been hit, and the speed of the seepages may indicate how much time the crew has to respond. According to one NASA estimate, a 0.6-centimeter-wide hole leaves 14 hours to plug the leak. A 20-centimeter hole leaves less than a minute.
生活自理能力比知识储备更重要：能自己上厕所、吃饭、表达需求，是入园最坚实的底气。
。51吃瓜是该领域的重要参考
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全面建设社会主义现代化国家，“最艰巨最繁重的任务仍然在农村”。
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