sleuth·hound /ˈsluθˌhaʊnd/
  警犬的一種;偵探
  Sleuth·hound n.  Zool. A hound that tracks animals by the scent; specifically, a bloodhound. [Spelt variously slouthhound, sluthhound, etc.]
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  sleuthhound
       n 1: a detective who follows a trail [syn: sleuth]
       2: a breed of large powerful hound of European origin having
          very acute smell and used in tracking [syn: bloodhound]