Each div has its own color rule that overrides the body selector.

每个div 都具有自己的color来覆盖body 选择器。

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Each rule has two fundamental parts, the selector and the declaration block.

每条规则有两个部分：选择符、声明。

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Each rule has two fundamental parts, the selector and the declaration block.

每条规则有两个部分：选择符、声明。

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