walk-through /ˈwɔkˌθru/
 走查


 walk-through
      n 1: a thorough explanation (usually accompanied by a
           demonstration) of each step in a procedure or process;
           "she gave me a walk-through of my new duties"
      2: a pedestrian passageway through the ground floor of a
         building
      3: a first perfunctory rehearsal of a theatrical production in
         which actors read their lines from the script and move as
         directed
      4: the act of walking in order to view something; "the realtor
         took her on a walk-through of the apartment"