（全部）头发,毛发、汗毛时不加S,
She has gray hair.她头发灰白.
比较：a few gray hairs 几根白发
（一根）头发,（一根）毛 加S
root hairs of a plant 植物根毛
这是字典里面的例子,按照以上例子,我觉得你的问题里面也要加的,而且可能用“gray”比“white“更形象
hair什么时候+s如some white （hair）空里的hair要加S吗
1个回答
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