If the input and output messages do not have the same type, you would use a data map (explained in the next section) to map between the two types.
如果输入和输出消息具有不同的数据类型，应该使用数据映射(将在接下来的部分中介绍)来映射这两种类型。
For example, you could have the output of each node embedded in an image file and stored on a Web server, ready to be fetched by the next hop in the network.
比如说，您可以将各节点的输出嵌入到一个图像文件中并将其存储在 Web 服务器上，以供网络的下一层获取。
Next to each post title in the output you want to have picture of either a plant, or a flower, depending on which category is being displayed.
在每个文章标题旁边的输出中，取决于你正在显示的类别，你可能想要一颗植物或者一朵花的图片。
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