finger nail

例句：

1. 1. She carefully trimmed her fingernails before going to bed.
   她睡前仔细修剪了手指指甲。
2. 2. The man had a deep cut on his fingernail and needed medical attention.
   那名男子的手指指甲上有个深口子，需要医疗照顾。
3. 3. He used a file to smooth the rough edges of his fingernails.
   他用锉刀磨平了手指上的粗糙边缘。