Old friends are lost and new friends appear.

旧朋友失去了，新朋友出现了。

youdao

youdao

youdao

This past summer, the Voice of America held a discussion among experts called "Endangered Languages: Saving Voices Before They Are Lost."

VOA: special.2009.12.02

So,Once they are lost in response to a toxic sound or to an antibiotic it cannot be regenerated by natural means.

一旦因噪音或抗生素遭受损失,就难以再生。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

You are lost. You're in a new city and you're lost and you don't know where you're going.

你迷路了。你刚到一个城市，没法找到方向。你不知道你该怎么走。

How long课堂 - SpeakingMax英语口语达人

This clears the form-field bottleneck, which is where a lot of online sales are lost.

FORBES: Optimize Your Website To Convert Visitors To Buyers

Right now those data are lost to the wind once the trial is over.

FORBES: Merck's Free Radical

Never mind that this is mostly pointless: if the hard disk crashes, both partitions are lost.

FORBES: With Rise Of Consumer Mobile Devices, We're All CIOs Now