paint fingernails染指甲
clean fingernails面孔白净
weak fingernails指甲不坚
long fingernails留长指甲;长指甲
Cracking fingernails手指甲开裂
Hammering Fingernails独立车库
GOLDEN FINGERNAILS金色的指甲
Dyeing Fingernails染指甲
your fingernails如何
Significant correlation was found between PFCs in human fingernails and pesticide usage, drinking water types, canned food, beef and egg consumption and family average per person month income.
与儿童指甲中PFCs浓度具有显著相关性的因素主要包括：家中使用杀虫剂状况、饮水类型、食用罐头食品状况、牛肉和鸭蛋食用量以及家庭月人均收入。
参考来源 - 儿童指甲中全氟化合物的地区性分布及其影响因素研究N-COUNT（可数名词） Your fingernails are the thin hard areas at the end of each of your fingers. 手指甲