nail file

例句：

1. 1.She used a nail file to smooth the rough edges of her nails.
   她用指甲锉修整了指甲的边缘。
2. 2.The nail file was so sharp that it could easily cut through the paint.
   那个指甲锉非常锋利，可以轻松地切穿油漆。
3. 3.He carefully used the nail file to remove any remaining nail polish.
   他小心翼翼地使用指甲锉去除任何剩余的指甲油。