footprint

• n.
  • a mark of a foot or shoe on a surface

    "the police made casts of the footprints in the soft earth outside the window"

    同义词： footmark step

  • a trace suggesting that something was once present or felt or otherwise important

    "the footprints of an earlier civilization"

  • the area taken up by some object

    "the computer had a desktop footprint of 10 by 16 inches"

以上来源于: WordNet