Rules with a tag selector as the key.

标签选择器作为键的规则。

youdao

Perhaps the most commonly used selector is the type selector, though most people think of it as a tag name or element selector.

最常用的选择符可能是类型选择符，但是大多数人把它称为标记名或元素选择符。

youdao

So the selector for the style starts with the HTML tag and is followed by an extension that describes the style.

样式的选择符以这个HTML标记开头，后面是一个描述这个样式的扩展。

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