on file in a file or filing system 存档。 on filestored in a file 存档 * This card should be kept on file for reference. 这张卡片应该存盘以备参考。 * Our documents on file may throw some light on the matter. 我们保存的文件也许会对这件事有所启示。on file合订成册保存;归档：Important business letters should not be discarded after reading，they should be put on file.重要的业务信函阅过以后不要乱扔，要把它们归档。 |