treadn.步法；踏面；胎面花纹；鞋底v.踩；行走；践踏；(鸟类)交配tread ply胎面花纹层treadwearn.胎面磨损Treadwelln.特雷德韦尔tread bar轮胎抓地齿treadlessadj.(轮胎)无花纹的Treadgoldn.特雷德戈尔德tread rig胎面横向花纹treadplate上面有花纹防止滑动或增加吸力的金属板tread uponvt.践踏(蹂躏)tread mill脚踏轧机