undercover cop:便衣警察。
undercover:秘密工作的;暗中做的;私下進行的。
I used to be a undercover police officer.
我曾經是一個臥底警察。
You were deep undercover, and she
figured it out.
你是個臥底,而她發覺了。
I'm a undercover. I'm on the job.
Don't shoot!
我是臥底探員,我正在執勤,別開槍!
Are you working undercover as a hobo?
你今天臥底扮流浪漢?
hobo:流浪的失業工人;(尤指農場)季節工人,零工。