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shampooxia
abrasion英 [əˈbreɪʒn] 美 [əˈbreʒən] n.磨损;擦伤处;<喻>摩擦;<地质>磨蚀（作用）例句：It possesses a balance of performance properties such as good flexibility, toughness and abrasion resistance. 它具备了如良好的弹性，韧性和耐磨性的表现性能的平衡。
蓝晶灵儿
你好！磨损严重serious abrasion
优优妈妈0509
too complicated, you need a professional dictionary.
jingbin657501
The tread on the tire has been worn out.
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