浏览器接受该页面并将之转换为树形结构，如图1所示。
The browser takes this and converts it into a tree-like structure, as in Figure 1.
为了可以阅读特定的细节而扩大浏览范围的需求说明我们在之前所提到当要看大形树形结构时会遗漏掉一些视觉内容的形情。
The requirement to magnify the view in order to read specific details introduces the same loss of visual context mentioned above in our discussion of large tree structures.
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