孩子摔倒后，膝盖上有几处擦伤。
The child had several abrasions on his knees after falling down.
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abrasions英 /əˈbreɪʒənz/|美 /əˈbreɪʒənz/
解释
abrasions 是名词 abrasion 的复数形式。abrasion 来自动词 abrade（磨损、擦伤），指皮肤因摩擦或刮擦而造成的表层损伤，即"擦伤"。
The child had several abrasions on his knees after falling down.
abrasions 是名词 abrasion 的复数形式。abrasion 来自动词 abrade（磨损、擦伤），指皮肤因摩擦或刮擦而造成的表层损伤，即"擦伤"。