protective custody system监护制度
protective custody unit监狱保护部队
Protective Custody Forms保护性监护
N-UNCOUNT（不可数名词） If a witness in a court case is being held in protective custody, they are being kept in prison in order to prevent them from being harmed. 保护性拘留
They might be doing me a good turn if they took me into protective custody.
如果他们对我进行保护性拘留，那对我可能是一件好事。