名词
中文翻译：衰退区域
同义词：
['decreasing area', 'declining area', 'declining region']
例句：
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1. The population of the declining region is decreasing rapidly.
这个衰退区域的人口正在迅速减少。
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2. The economy of thedeclining region has been hit hardby the pandemic.
这个衰退区域的经济受到了疫情的严重影响。
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3. The government has launched aplan to revitalize the declining region.
政府已经启动了一个计划，以振兴这个衰退区域。