DICT.TW Dictionary Taiwan

 back door
 後門;不正當的手段

 Back door A door in the back part of a building; hence, an indirect way.
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 back door
      n 1: a secret or underhand means of access (to a place or a
           position); "he got his job through the back door"
      2: an entrance at the rear of a building [syn: back entrance]