fine file

例句：

1. 1. The company needs to keep its financial records in a fine file for security reasons.
   出于安全原因，公司需要将财务记录保存在细长的文件中。
2. 2.He carefully filed the documents into his desk drawer.
   他小心翼翼地将文件整理到桌子抽屉里。
3. 3.The lawyer needed to review the fine file of the case to prepare for trial.
   律师需要审查案件的细长档案来准备审判。