“emergency landing zone”的概念、定义、翻译、参考文献-科学参考

单词	emergency landing zone
释义	emergency landing zone Encyclopedia 工学落区释 emergency landing zone应急着陆区弹箭回收时备选着陆区域。载人航天领域特指出现危及航天员生命安全或载人飞船出现不可修复故障的异常情况下，载人飞船返回舱需要紧急着陆的预选区域。
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