如果您曾将页面加载到浏览器中后看到完全出乎意料的结果，您可能在看到浏览器结果时会猜想您的结构应该如何，并沮丧地继续工作。
If you ever loaded your page in a browser and saw something completely unexpected, you might have viewed the result of a browser trying to guess what your structure should be and doing the job poorly.
作为一个软件开发者，你一定会对网络应用如何工作有一个完整的层次化的认知，同样这里也包括这些应用所用到的技术：像浏览器，HTTP, HTML，网络服务器，需求处理等等。
As a software developer, you certainly have a high-level picture of how web apps work and what kinds of technologies are involved: the browser, HTTP, HTML, web server, request handlers, and so on.
最后，您将了解如何使用Web浏览器测试公开的Web服务是否正常工作。
Finally you will see how to use a Web browser to test that the Web service works.
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