名词
中文翻译：不宁日
同义词：
['uncertainty', 'instability']
例句：
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1.The company is facing an ununennium due to the economic downturn.
由于经济衰退，公司正面临一个不稳定的时期。
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2.The scientists are unsure about the results of their experiment, as it was conducted during an ununennium.
科学家们对实验结果不确定，因为实验是在不稳定时期进行的。
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3. The government's decision on the economy has caused a period of ununennium for the country.
政府对经济的决定给国家带来了一段不稳定的时期。