expectation of life years a person is expected to live
一个人的预期寿命年数
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Expectation of life is the average Numbers of years that a person is expected to live. The expectancy of life is the prediction of average years a person can live.
估计寿命是预计一个人能活得平均年数。
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