意思是“步行”。
英语中交通方式的表达：
步行是：on foot. 如：I go to school on foot.
骑自行车：by bike. 如：I go to school by bike.
开车：by car. 如：I go to school by car.
乘公车：by bus. 如：I go to school by bus.
乘火车：by train. 如：I go to school by train.
搭飞机：by plane. 如：I go to school by plane.
乘船：by boat. 如：I go to school by boat.