treadn.步法；踏面；胎面花纹；鞋底v.踩；行走；践踏；(鸟类)交配tread board踏板tread warily小心处理, 轻轻地走tread length踏板长度treadle bowl踏杆转子tread radius胎面半径tread groove胎面花纹沟treadle loom脚踏织机,踏杆式织机tread rubber胎面胶tread on airvi.洋洋得意(飘飘然)tread people接人