步行者,脚标
footer n 1: (used only in combinations) the height or length of something in feet; "he is a six-footer"; "the golfer sank a 40-footer"; "his yacht is a 60-footer" 2: a person who travels by foot [syn: {pedestrian}, {walker}] 3: a printed note placed below the text on a printed page [syn: {footnote}]