您需要修改发送简单文本字符串的初始测试客户机，使其发送XML消息。

You will modify the original test client that sent a simple text string to send an XML message.

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也可以通过超文本传输协议(HTTP)发送简单的消息来实现SOA。

You can implement SOA just as well by sending simple messages over Hypertext Transfer Protocol (HTTP).

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当我们通过引入子系统来简化模型时，我们把序列图中大的段落替换成向该子系统发送一条简单的消息。

And when we simplify our models by introducing subsystems, we replace large sections of the sequence diagram with a single message to the subsystem.

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