expectancy n
预期寿命n
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Expectancy n. An expected amount calculated on the basis of actuarial data.
根据精确资料求得的预期数额。
youdao
Guinea Bissau has Africa's second lowest rating on the U.N.'s Human Development Index measuring life expectancy,education, and standards of living.
VOA: standard.2009.04.24
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