foot·fall /ˈfʊtˌfɔl/
  腳聲,踏步,腳步
  Foot·fall n. A setting down of the foot; a footstep; the sound of a footstep.
     Seraphim, whose footfalls tinkled on the tufted floor.   --Poe.
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  footfall
       n : the sound of a step of someone walking; "he heard footsteps
           on the porch" [syn: footstep, step]