单词common-nail
网络: 求购钉子；普通铁钉；求购普钉
Onychomycosis is one of the most common nail disorders seen by dermatologists.
甲真菌病是最常见的指甲疾病被皮肤科医师。
Just like a common nail or ball bearing, they will easily stick to a magnet, but they are not magnetic.
就像一个共同的指甲或球轴承，他们将很容易粘到一块磁铁，但他们没有磁性。