名词
1. 足迹;脚印
A footprint is a mark in the shape of a foot that a person or animal makes in or on a surface.
1. the area taken up by some object
e.g. the computer had a desktop footprint of 10 by 16 inches
2. a mark of a foot or shoe on a surface
e.g. the police made casts of the footprints in the soft earth outside the window
3. a trace suggesting that something was once present or felt or otherwise important
e.g. the footprints of an earlier civilization