实质上一个方法的任一标识属性都可以从类和包名映射到注释并返回类型。

Virtually any identifying attribute of a method can be mapped from class and package names down to annotations and return types.

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这样的图将在水平轴方向的框中包含一个变量名及其类类型，如图2所示。

Such a diagram will contain a variable name and its class type in the boxes along the horizontal axis, as seen in Figure 2.

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根据 ID、元素类型或 CSS 类名查找元素非常有用，但如何根据元素在 DOM 树中的位置执行查找呢？

Finding an element based on its ID, element type, or CSS class name is very useful, but what if you want to find an element based on its position in the DOM tree.

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