n. 踏, 步态, 梯级, 交尾, 鞋底
vi. 踏, 行走, 交尾
vt. 踩, 踏, 践踏, 跳(舞)
英文释义
n. the grooved surface of a pneumatic tire
n. the part (as of a wheel or shoe) that makes contact with the ground
n. structural member consisting of the horizontal part of a stair or step
v. tread or stomp heavily or roughly