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1·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。

2·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》

3·Maybe she simply lost track of time.

或许她只是忘了时间。

4·I had so much fun, I lost track of time.

我玩得太愉快，所以忘了时间。

5·What if I lost track of my account number?

如果我忘了账号怎么办？

6·I've lost track of how much money he owes me.

我已经忘记他到底欠我多少钱了。

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

别问是哪一个；我们早就迷路了。

8·I lost track of how many people invited to this party.

我邀请了多少人到这派对我自己也搞不清了。

9·Experts said German intelligence had long lost track of Bahaji.

专家表示德国情报部门很早就失去了巴哈吉的踪迹。

10·offer some help in case users have lost track of the process.

为防止用户不清楚购物流程而提供一些帮助

忘记

1·I lost track after a while, happy to be home, weeping for my father, and thinking about what was next.

好一会儿我才忘记这些，开心地回到家，为我的父亲哭泣，然后考虑下一步该怎么办。

2·Anyone who has lost track of time when using a computer knows the tendency to miss lunch.

使用电脑时忘记时间的人都知道玩电脑很容易吃不上午饭。

3·You've accumulated overtime because you were so into the work you were doing that you lost track of time.

太投入于手头工作，加班加点的时候你忘记了时间。

4·Child, don't worry about him. He probably just lost track of time.

孩子，别担心他。他可能只是忘记了时间而已。

5·I've lost track of how much money he owes me.

我已经忘记他到底欠我多少钱了。