We will create a custom message converter to send a trade creation request message from the client to the middle tier.
我们将创建一个自定义消息转换器，来发送一个从客户端到中间层的关于交易创建的请求消息。
Your goal is to create a converter that is easy to extend to handle additional formats and that keeps logic for any particular input or output format as separate as possible.
我们的目标是创建一种转换器，既能轻松进行扩展来处理额外格式又能尽可能地将任何特定的输入或输出格式的逻辑保持分离。
You'll create an RSS-to-spreadsheet converter, which retrieves all the news stories from a remote RSS feed, extracts story metadata from the feed, and places it in spreadsheet rows and columns.
您将创建一个RSS到电子表格的转换器，该转换器从一个远程rss提要检索所有新的新闻，从提要中提取新闻元数据，并放置到电子表格的行和列中。
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