这种设计允许您做的是，可以利用每个可用的协议的优势而不必让您的客户端依赖于正在使用的特定协议。
What this design allows you to do is to take advantage of each of the available protocols without having to have your client depend on the specifics of which protocol is being used.
一种被称作Salmon的协议，可用于在多个服务间提交评论。
A protocol, called Salmon, can be used for submitting comments across multiple services.
在大多数编程语言中，该协议有可用的实现和工具，在许多情况下是免费的。
This protocol has implementations and tools available in most programming languages, in many cases cost-free.
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