Definition
Used to emphasize that one is unable to do or remember something, despite trying very hard.
尽管很努力
I can't recall his phone number for the life of me.
我怎麼也想不起他的電話號碼。
She couldn't remember where she put the keys for the life of her.
她怎麼也想不起她把鑰匙放在哪裡了。
I cannot understand this paper for the life of me.
我怎麼也看不懂這篇論文。