By the year 2050, women will have a life expectancy of 83.6 years and men of at least 75.1.
到2050年,女性预期寿命将达到83.6岁,男性预期寿命至少达到75.1岁。
The average life expectancy was 40.
平均期望寿命曾是40岁。
Life expectancy rates climbed, because doctors and scientists developed effective ways to prevent or treat diseases such as tuberculosis, typhoid,diphtheria,and influenza.
VOA: special.2010.12.02
The same nations and the short life expectancy of birth probably the lowest quality of life in other areas.
这一数字在下降,在上述国家,新生儿预期寿命较短,某些区域生活质量极低。
What I plot on this graph here is as a function time, years, dates, life expectancy as a function of time.
在这儿的这张图是,一个关于时间,年,日期的函数,将寿命长短作为时间的函数
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