treadlen.踏木;踏板;踏踏板v.踩踏板操作
treadn.步法;踏面;胎面花纹;鞋底v.踩;行走;践踏;(鸟类)交配
Treading on the Elder's mouth
tread sb.'s rights underfoot
treadle operated rice thresher脚踏打谷机
Tread - mill exercise testing活动平板运动试验