Plug-ins, generally speaking, are software additions to particular applications which provide enhanced functionality. Often import and export filters for various file formats are stored as plug-ins in a plug-in directory.
总的来说，插件是可提供增强功能的对特定应用程序的软件添加内容。通常，用于不同文件格式的导入和导出过滤器会在插件目录中作为插件存储。