lifetimes造句
        Wealth always passed by these scholars who were all treated unfairly in their 
lifetimes.
在济宁,意外地得知,李白竟也是在济宁住过了二十余年咧!
And hence the mean 
lifetimes of the two brands of engines, are equal.
也就是说,两种牌号引擎的平均寿命是相等的.
Satellite 
lifetimes in orbit range from a matter of days to hundreds of years.
卫星在轨道上的寿命从几天到几百年不等.