A2 [ C or U ] any of several different types of container used to store papers, letters, and other documents in an ordered way, especially in an office（尤指办公室的）文件箱，文件夹，卷宗

[ C ] written records that are kept about a particular person or subject档案

A2 [ C ] information stored on a computer as one unit with one name（计算机的）文件，文档

[ C or U ] a long line of people or animals, one behind another排成一行的人（或动物）

[ C ] a thin, flat or rounded metal tool with rough surfaces for rubbing wooden or metal objects to make them smooth or to change their shape锉；锉刀

[ T ] to store information in a careful and particular way把…归档

[ T ] specialized law to officially record something, especially in a law court（尤指在法庭）提起（诉讼）

[ T ] News reporters file a story by sending it to their office, usually by phone, email, or other electronic method.发送（报道）

[ I usually + adv/prep ] to walk in a line, one behind another排成纵队行进

[ I + adv/prep, T ] to use a file in order to make an object smooth or to change its shape锉平；锉光滑；锉去