文件扩展

例句：

1. 1. He filed a complaint against the company for unfair labor practices.
   他因公司不公平劳动实践向公司提出投诉。
2. 2. The police filed a warrant for his arrest.
   警方发出了逮捕令。
3. 3. She filed for divorce after 10 years of marriage.
   在结婚10年后，她申请了离婚。