The parents have lost track of their child since the kid got lost in the park 20 years ago.

自20年前孩子在公园走丢以来，这对父母就失去了孩子的音信。

youdao

He had lost track of what he was saying and began to ramble.

他忘了自己的话题，便开始瞎扯起来。

《牛津词典》

Don't ask which one, though; we've lost track.

别问是哪一个；我们早就迷路了。

youdao

The plan was to stay for a year or two, and then go back to Canada, and I lost track of time.

本来的计划是待一两年，然后就回多伦多，但是计划打乱了。

麻省理工公开课 - 固态化学导论课程节选

And because of this nutritionism, because of the reductionism where we have become so precise about what we eat in terms of its tiny constituents that we've lost track of the bigger picture of food.

由于被营养学,以及简化论所左右,使得我们对食物的,简化论:社会调查的一个名词指用个体层次资料揭示宏观层次的现象 每一点细节都变得特别在意 即用比较低的分析单位来测量而作出的是比较高的分析单位才能得出的结论,反而失去与食物在宏观上的联系

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So that's where it's easy to get lost, but let's see if these lines in the picture help us stay on track.

这就是容易迷惑的地方，下面看看,这幅图中的这些线能否帮助我们追踪。

哈佛公开课 - 计算机科学课程节选

It was not clear when or for how long the Marshals Service lost track of them.

CNN: U.S. lost track of two with known or suspected terror ties

But as refugees and staff boarded helicopters to evacuate, Than lost track of his family.

FORBES: Magazine Article

He was so focused on smiting bad guys that he lost track of everything else.

ECONOMIST: More vice than virtue