You can't spend all your life chasing shadows.

你不能一辈子追求虚无缥缈的东西。

《牛津词典》

You can't be dependent on your parents all your life.

你不可能一辈子靠父母生活。

《牛津词典》

You have been modelling yourself on others all your life.

你一辈子都在以别人为榜样。

《柯林斯英汉双解大词典》

"I kept on telling them you need to get out and explore and know these people 'cause you're going to be living here all your life, you're not going to be with the Sudanese people the whole time.

VOA: standard.2009.12.17

I'll bet even all of you can remember songs that you have known all your life, but not other things.

我打赌你们很容易就能想起你们曾经,听到的歌曲,但别的事就很难

耶鲁公开课 - 古希腊历史简介课程节选

and then you teach students and you do this for a very long time, all your life.

然后你就可以去教学生，这会是一个很长的过程，差不多你一生的时间。

教授的梦想 - SpeakingMax英语口语达人

"Once you meet him one time, it's like you've known him all your life, " she said.

NPR: W.Va. Sheriff Fatally Shot, Suspect In Custody

New York (CNN) -- When you meet Terry Gilliam you get the feeling that you have known him all your life.

CNN: The making of 'The Imaginarium of Doctor Parnassus'

You said you had been waiting all your life to write it.

NEWYORKER: She��s the One