a private eye
私人侦探
A: What's his job?
A: 他是干什么的?
B: He used to be a policeman.
B：他过去是个警察。
A: But Mrs.Smith hired him to find her lost son.
A：可史密斯太太雇用他寻找他失散的儿子。
B: Yeah.He's a private eye now.
B：没错，他现在是私家侦探了。