lifetime的釋義：

　　n.一生;終身;有生之年;(某物的)存在期，壽命，使用期限

　　復數： lifetimes

　　例句：

　　Works of art are in trust to us during our lifetime.

　　藝術品交由我們托管一生。

　　I want to take advantage of your lifetime of scholarship.

　　我希望能夠用到您一生的學識。

　　During my lifetime I haven't got around to much travelling.

　　我一生中沒怎么去旅行過。

　　You've given a lifetime of service to athletics

　　你為田徑運動貢獻了一生。

　　Say's writings reached a wide audience during his lifetime

　　在塞伊有生之年，他的作品擁有大量的讀者。