treadn.步法；踏面；胎面花纹；鞋底v.踩；行走；践踏；(鸟类)交配tread pattern胎面花纹tread profile胎面外形treadle pedal踏板treadle drive足踏传动,踏板驱动Tread braking踏面制动tread lightlyvi.轻轻地走(小心处理)treadle lathe脚踏车床tread of tyre胎冠tread-board踏板tread tractor大型拖拉机