名词 tread:

1. a step in walking or running

2. the grooved surface of a pneumatic tire

3. the part (as of a wheel or shoe) that makes contact with the ground

4. structural member consisting of the horizontal part of a stair or step

trtn.热处理(转台；六角转台)TRn.abbrTrulockn.特鲁洛克tracium卡肌宁(肌松驰剂)Trubrig特鲁布里希Troebst特勒布斯特Trombev特龙贝夫Troeger特勒格尔Traguth特拉古特Trachom沙眼,粒性结膜炎Trungel特伦格尔Traulia凸额蝗属

1. Every day he trod the same path to school.
   他每天都走同一条路上学。
2. She trod lightly so as not to wake the baby.
   她步子很轻，以免惊醒孩子。
3. The dog gave a yelp when I trod on its paw.
   我踩了那狗的爪子，它嚎叫了一声。
4. I trod on some glasses and cut my foot.
   我踩到了玻璃，划破了脚。