a public announcement or warning that an old person has disappeared

A Silver Alert has been issued for a missing 80-year-old man. 警方已发出银色警报寻找一名失踪的八十岁老先生。

At the request of the Police Department, the silver alert for her mother has been cancelled. 在警察局的要求下，为她母亲发出的银色警报已被取消。