Style sheets provide the means to specify the rendering of arbitrary elements, including whether an element is rendered as block or inline.
样式表提供了，包括指定一个元素是作为块级别还是行内来展现在内的，控制元素绘制的方法。
The INS and DEL elements must not contain block-level content when these elements behave as inline elements.
INS和DEL元素在其作为行内元素时不能包含任何块级别内容。
The INS and DEL elements must not contain block-level content when these elements behave as inline elements.
INS和DEL元素在其作为行内元素时不能包含任何块级别内容。
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