file utility

例句：

1. 2. 归档；提交；提交给
   上级或有关部门
2. 1. The company has filed for bankruptcy protection.
   该公司已申请破产保护。
3. 2. I need to file this report before it's due.
   我需要在报告到期前提交这份报告。
4. 3. They filed a lawsuit against the company for unfair labor practices.
   他们因不公平劳动实践向公司提起诉讼。