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::after, ::before 是伪元素不是伪类, 并且::after是作为最后一个子元素(之后), ::before是第一个子元素(之前)
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::after, ::before 是伪元素不是伪类, 并且::after是作为最后一个子元素(之后), ::before是第一个子元素(之前)
The text was updated successfully, but these errors were encountered: