expiration file

例句：

1. 1. The company's policy requires all documents to be expiration file within three months.
   公司政策要求所有文件在三个月内必须为过期文件。
2. 2.The old records were not kept up-to-date, so they were considered as expired files.
   旧的记录没有及时更新，因此被视为过期文件。
3. 3. After the expiration of the contract, the documents were considered as expired files.
   合同到期后，这些文件被视为过期文件。