图1显示了实例工程的布局。

Figure 1 shows the example project layout.

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页面抓取本质上是HTML页面的反向工程，也可以看成页面解释器，网页以HTML编码，HTML以树型结构表示信息，实际数据与布局代码以及效果信息混杂在一起，不能被计算机直接利用。

It can also be thought of as parsing out chunks of information from a page. Web pages are coded in HTML, which uses a tree-like structure to represent the information.

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地上、地下工程管线规划布局、设计与敷设要严格执行有关安全生产的法律、法规和标准。

The layout, design and installation of pipelines on the ground and underground projects shall strictly enforce the laws, regulations and standards concerning safety in production.

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