I was disappointed to find that they had left already.

我发现他们已经离开了，觉得很失望。

《牛津词典》

youdao

youdao

Men who had no jobs decided to use all the money they had left to go to Alaska.

VOA: special.2009.02.04

People were very upset that they had left their money in the bank and the government was just saying, you can't have it.

人们对留在银行账户里的资金忧心忡忡,而政府只是说,你们不可以取款

耶鲁公开课 - 金融市场课程节选

"If it had not been for them, I would not be here today," Wilson says the dedication of the Japanese American soldiers was all the more remarkable given the fact that they had left behind their families in internment camps where the U.S.government had placed them out of fear that they might help Japan.

VOA: standard.2009.11.04

Mr Bygott said they had left Bristol on Sunday but experienced worsening weather conditions.

BBC: Courageous II wrecked near Padstow: Crew 'in danger'

"I knew they had left them with them and nobody knew where they were, " Weining said.

NPR: Couple Jailed For Fleeing With Kids To Face Judge

Gangs threatened them with deportation or violent reprisals against the families they had left behind.

BBC: Sex slaves 'trapped in UK'