abrasions

n.

an abraded area where the skin is torn or worn off

同义词：scratchscrapeexcoriation

erosion by friction

同义词：attritioncorrasiondetrition

the wearing down of rock particles by friction due to water or wind or ice

同义词：grindingattritiondetrition

1. The hiker suffered several abrasions on his knees after falling on the trail.
   徒步旅行者在步道上摔倒后，膝盖上有多处擦伤。
2. The constant rubbing caused abrasions on the rope, reducing its strength.
   持续的摩擦导致绳子表面磨损，降低了其强度。