per·am·bu·la·tor /pəˈræmbjəˌletɚ/
 搖籃車,勘查者,路程計
 Per·am·bu·la·tor n.
 1. One who perambulates.
 2. A surveyor's instrument for measuring distances. It consists of a wheel arranged to roll along over the ground, with an apparatus of clockwork, and a dial plate upon which the distance traveled is shown by an index. See Odometer.
 3. A low carriage for a child, propelled by pushing; a baby carriage; -- called also pram, in Britain.
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 perambulator
      n : a small vehicle with four wheels in which a baby or child is
          pushed around [syn: baby buggy, baby carriage, carriage,
           pram, stroller, go-cart, pushchair, pusher]