I cannot for the life of me imagine why they want to leave.

我怎么也想象不出他们为什么要走。

《牛津词典》

For the life of me, I can't solve this puzzle.

就是要了我的命，我也无法解出这一难题。

youdao

For the life of me, I couldn’t figure out why it wasn’t auto-completing my brother’s work cell number when I typed his name.

对我而言，不能理解的是，当我输入我兄弟的名字时，为什么不能自动完成他的工作手机号码编号。

youdao

He tried several times to thank me for saving the life of the Princess.

VOA: special.2011.08.06

Tell me later what it is you're going to be doing for the rest of your life.

你们有谁说过自己讨厌一门学科吗？,今后记得告诉我你打算从事什么行业。

麻省理工公开课 - 化学原理课程节选

I don't want to be told that I could sit here for the rest of my life just sort of parsing one sentence. Don't tell me about that.

我可不想坐在这里学一辈子,就为了解读一个句子的意思，千万别这么告诉我。

耶鲁公开课 - 文学理论导论课程节选

For the life of me I cannot agree that the string of macro economic data came in better than expected.

FORBES: Data Suggest U.S. Growth Is Picking Up: GDP Could Expand 2.4% In Q3

For the life of me, I don't know why Pelosi, the presumptive next speaker, decided to publicly come out for Murtha.

NPR: The Democratic Sweep, and Where I Called It Wrong

That said, I cannot for the life of me figure out how to delete or move a single message in a conversation, but rather I must edit the whole exchange.

FORBES: How Does The Gmail iOS App Compare To The Native Mail App?