名词
中文翻译：封闭国家
同义词：
['closed state', 'isolated country']
例句：
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1.The closed country is still recovering from the economic crisis.
这个封闭国家仍在从经济危机中恢复。
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2.The government has been trying to open up the closed country for decades.
政府已经尝试了几十年来开放这个封闭国家。
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3.This closed country has a rich cultural heritage that is worth exploring.
这个封闭国家拥有丰富的文化遗产，值得探索。