arm nail

例句：

1. 1. She carefully trimmed her fingernails before going to bed.
   她睡前仔细修剪了手指的指甲。
2. 2.The man had a long history of nail fungus.
   这个男人有很长的历史，患有甲真菌病。
3. 3.The doctor advised him to keep his fingernails clean and dry to prevent infection.
   医生建议他保持手指干净干燥以防止感染。