odom·e·ter /oˈdɑmətɚ/
  里程表
  o·dom·e·ter n.  An instrument attached to a vehicle or connected, as by a flexible cable, to the wheel of a vehicle, which measures the distance traversed.
  2. A hodometer.
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  odometer
       n : a meter that shows mileage traversed [syn: hodometer, mileometer,
            milometer]