uneven nail surface 指甲面不平
Do not use emery board to scrap your natural nail surface at all.
不要使用金刚砂局取消您的自然指甲表面的。
If the nail surface is rippled or pitted, this may be an early sign of psoriasis or inflammatory arthritis.
指甲表面呈现出波纹或者坑坑洼洼，可能是牛皮癣或炎症性关节炎的早期症状。
A corroded surface of a rusty metal nail appears like an alien environment when enlarged 600 times.
生锈铁钉遭到侵蚀的表面放大600倍后，好似外星环境。
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