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

We may have lost some luggage so we'd like to make a lost luggage report.

我们可能遗失了几件行李，所以我们要填一份行李遗失报告。

youdao

If it's lost, it's lost. Just be more careful from now on.

丢了就丢了吧，以后小心点。

《新英汉大辞典》

Many Americans learned this the hard way by investing all their money in stock shares, which then lost value.

VOA: special.2011.03.27

This is a little paradise, a paradise on the verge of being lost as the shades lose their leaves.

这是一个微小的天堂，一个随着叶子的凋落,即将失去的天堂。

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A lot of times they have lost their job, or have become injured or something, so they can't work anymore.

大多数情况下，他们可能是失业了，或者受伤了等等原因导致他们无法继续工作。

我帮助过的人们 - SpeakingMax英语口语达人

He has lost his temper in prior jobs and, in doing so, lost the clubhouse.

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And if a job is lost, that entire income is lost and its associated purchasing power.

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And so, Judy and John lost not only John's job, they lost their health insurance.

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