在以上的宣告中,只有当子选择器是在父选择器之内时,样式才会被用到。
The style defined above will apply to child selectors only when they are inside the parent selector.
该清单表示,具有相同em值的字体大小差异是由于不同子选择器中的分层布局造成的。
This listing says the font size differences having the same em values are due to the hierarchical layout of different child selectors.
其中一个选择器中的子字体大小,将成为处于选择器集合中较低层次的另一个选择器的父字体大小。
A child font size in one selector becomes a parent font size in another selector in the lower level in the hierarchy of selector sets.
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