MIME是电子邮件协议的一个扩展，它允许其他类型的数据在互联网上传送，就像视频、音频以及图片和应用程序。
MIME is an extension of the E-mail protocol, to allow other types of data to be exchanged over the Internet, such as video, images, and applications.
我们的应用程序中包含一个Image模型，该模型使用我们内部编写的一个文件上传插件来持久化图片数据。
Our application has an Image model. It uses a file upload plugin that we wrote in-house to persist image data.
情景4想象一下你正在开发一个允许用户向中心网站上传文本和图片的网络日志应用程序。
Scenario 4. Imagine that you're developing a blogging application that allows users to upload their text and graphics to a central website.
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