这支武装部队已发动进攻要夺回失去的阵地。The armed forces have launched offensives to recapture lost ground.他们要求归还所有失去的土地.They demanded the restoration of all their lost lands.她整天都在痴痴地想她失去的爱情.She spent the day mooning about her lost love....

“失去的”的英语可以翻译为：lost，[法] bereft ...