His mind would wander, and he would lose track of what he was doing.

他会心不在焉起来，忘了自己刚才正在干什么。

《柯林斯英汉双解大词典》

Do you mind telling me how I can lose weight?

你介意告诉我怎样才能减肥吗？

youdao

So what will really boost your brainpower, and what will make you lose your mind?

那么什么东西能提升你的脑力，什么东西又会让你失去智慧呢？

youdao

Her father loses his job and starts to lose his mind.

VOA: standard.2010.07.22

It's important to keep in mind always that what we do can be fun And never lose that sense of fun and enjoy exploring things I think being an engineer is partly just problem-solving and mind-set.

有一点非常重要,就是始终牢记我们所做的事情是令人愉快的,不要丧失了这种愉悦感,要享受探索的乐趣,我认为成为一名工程师从某种程度上来说,就意味着解决问题，提出创意。

普林斯顿公开课 - 领导能力简介课程节选

"You could lose your mind in there, " Shargel argued.

FORBES: Magazine Article

Your little baby sister's gonna lose her mind.

NPR: The Arcade Fire, Dark and Energetic

Without sleep, you will literally lose your mind.

FORBES: Sleepless In The Big City: Why Leaders Are So Tired (and what can they do about it)