She was wailing for her lost child.

她因失去孩子而嚎哭。

《新英汉大辞典》

They looked everywhere for the lost child.

他们四处寻找走失的孩子。

《新英汉大辞典》

He looked like a lost child.

他看上去就像走失的孩子。

youdao

It was like the cry of a lost child in the far deep of the darkening forest!

VOA: special.2009.10.31

The legal subject is the father; he has lost a child. So I have to suffer the literal punishment, as a father, I have to lose my child. Right?

法律主体是父亲，他失去了孩子，作为父亲，我也必须,遭受原义惩罚，失去我自己的孩子，对吧？

耶鲁公开课 - 旧约导论课程节选

The latest victim on Palm Island of the H1N1 virus is a pregnant woman, who lost her unborn child after contracting the disease.

VOA: standard.2009.07.24

It is as though a long lost child has finally returned home.

CNN: Iraq's Baby Noor: An unfinished miracle

She told the court she found herself thinking about a lost child who had been reported missing on a radio bulletin and turned towards the depot instead of the woman's home address.

BBC: Driver who left woman with dementia on bus not guilty

Because while nothing can fill the space of a lost child or loved one, all of us can extend a hand to those in need -- to remind them that we are there for them, that we are praying for them, that the love they felt for those they lost endures not just in their memories but also in ours.

WHITEHOUSE: President Obama Makes a Statement on the Shooting in Newtown, Connecticut | The White House