The fallback scheme permits a single viewer to handle all rule result rendering, yet allows alternate viewers to be attached anywhere in the tree to override the default behavior.
退回方案允许单个检查器,去处理所有呈递的规则结果,并允许不同的检查器联系树状图的任何地方,以替换默认的行为。
As a general rule, anywhere constants are in use, such as in places you are currently using the switch code to switch constants.
一条普遍规则是,任何使用常量的地方,例如目前用switch代码切换常量的地方。
Note that this rule applies to a link anywhere within a paragraph, even if it's nested within another element. For example, if the HTML were actually.
注意,这个规则应用于段落中任何地方的链接,包括嵌套在另一个元素中的链接。
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