请参见 HTML 5规范一个>.以 p元素为例.

内容模型将告诉您它可以包含的内容.在这种情况下:短语内容."链接到散布有异常的元素列表.

The Content Model will tell you what it can contain. In this case: "Phrasing content.", which links to a list of elements interspersed with exceptions.