柯林斯詞典life expectancy (life expectancies) 1. N-UNCOUNT The life expectancy of a person, animal, or plant is the length of time that they are normally likely to live. 平均期望壽命[also N in pl] The average life expectancy was 40. 平均期望壽命曾是40歲。 返回 life expectancy劍橋詞典the length of time that a living thing, especially a human being, is likely to live （尤指人的）預(yù)期壽命 Life expectancy in Europe increased greatly in the 20th century . 歐洲人的預(yù)期壽命在20世紀(jì)大幅增長(zhǎng)。 返回 life expectancy