图1显示了实例工程的布局。
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.
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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