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Private investigator
01
私人侦探
someone who can be employed as a detective to collect information
例子
The company hired private investigators to monitor the activities of a suspected corporate spy.
The private investigator was determined to run the suspicious activity down.
The private investigator was hired to tail a potential witness.
She hired a private investigator to look into a suspicious business deal.
The private investigator's black book was filled with the names of informants and confidential sources who provided valuable information.
