名词
中文翻译：备用区域
同义词：
['backup area', 'fall-back zone']
例句：
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1.The company has set up a fallback area in case of power outages.
公司已经设立了一个备用区域，以防停电。
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2.The engineers have developed a fallback area to support the damaged equipment.
工程师们已经开发了一个备用区域来支持受损的设备。
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3.During emergencies, the fallback area is used as a temporary shelter for the public.
在紧急情况下，备用区域被用作公众的临时避难所。