fly·over /ˈflaɪˌovɚ/
  低空訪問飛行;高架平交道
  flyover
       n 1: bridge formed by the upper level of a crossing of two
            highways at different levels; "an overpass is called a
            flyover or a flypast in England" [syn: overpass, flypast]
       2: a low-altitude flight (usually of military aircraft) over
          spectators on the ground [syn: flypast]