An attachment is usually a large file so a good programming practice is to not use it in your application until it is needed; instead, use a token to represent it.
附件通常是一个很大的文件，因此好的编程实践是直到必要时才使用它；作为替代选择，使用令牌来表示它。
We needed to be certain that the attachment was sent to the business process in the request and the processed attachment was returned to the application.
我们需要确认附件在请求中被发送到业务过程，并且已处理的附件被返回到应用程序。
Easy Attachment, no chest strap or watches needed; just slip inside your goggle strap.
简单，没有胸带附件或手表就溜进你的需要；睁眼表带。
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