[usually pl.] a mark left on a surface by a person’s foot or shoe or by an animal’s foot 脚印；足迹
footprints in the sand
沙地足迹
muddy footprints on the kitchen floor
厨房地板上的泥脚印
the amount of space that sth fills, for example the amount of space that a computer takes up on a desk （某物所占的）空间量，面积