名词
中文翻译：等价年金
同义词：
['annuity', 'annuity policy']
例句：
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1.The level of the fund is a key factor in determining the performance of the investment.
基金的净值是决定投资表现的关键因素。
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2.The level of education required for this job is high.
这个职位所需的教育水平很高。
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3.The level of unemployment in the country has been declining steadily.
该国的失业率一直在稳步下降。