名词
中文翻译：无特定中文翻译
同义词：
['declining', 'declining', 'declining']
例句：
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1. Thepopulation of the city is experiencing a declinein recent years.
近年来，该市的人口正在减少。
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2. The economy of the country isshowing signs of degeneration.
该国的经济正显示出衰退的迹象。
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3. The species is facing aserious threat to its survival due to environmentaldegradation.
由于环境退化，该物种正面临严重的生存威胁。