undercover 

  1. 形容詞
從事臥底的, 秘密從事的
從事間諜活動的, 秘密的

    同義字詞
backstairs,behind-the-scenes,clandestine,covert,furtive,hugger-mugger,hush-hush,private,privy,secret,sneak,sneaking,sneaky,stealth,stealthy,surreptitious,underground,underhand,underhanded
secret

  2. 名詞
臥底
/此名詞複數為"undercovers"/
an undercover officer/
undercover officers:
臥底警員
臥底警務人員
便衣警察
an undercover agent(同an undercover)/
undercover agents(同undercovers):
臥底

    
                        
    3. 
                                            

                

            

            
            

                

                
例句

                

                    
    
                                                    
  1. 
                                Tony Leung as Tony: An undercover cop.                            
    2. 
                                                    
  2. 
                                All officers on the base worked undercover .                            
    3. 
                                                    
  3. 
                                Never here about undercover white collar busts .                            
    4. 
                                                    
  4. 
                                He was accused of fondling an undercover policeman.                            
    5. 
                                                    
  5. 
                                Well how else does a cop go undercover at Royal Ascot?                            
    6.