tready条约treadn.步法；踏面；胎面花纹；鞋底v.踩；行走；践踏；(鸟类)交配tread a middle course取中庸之道,避免极端TREAD WEAR INDICATORS轮胎磨耗指示器tread patterns' noisetreadle-type plough键(簧)式犁tread on sb.'s toestreadle sewing machine脚踏缝纫机tread cushioning layer底胎面tread the right course在正确道路上前进tread a dangerous path踏上危险的道路tread reclaimed rubber胎面再生胶