HTML著重元素()標記出需要用戶著重閱讀的內容，元素是可以嵌套的，嵌套層次越深，則其包含的內容被認定為越需要著重閱讀。

瀏覽器支持

示例

元素通常被用于指示一個隱式或顯式的對比。

in html 5, what was previously called block-level content is now called flow content.

結果

in html 5, what was previously called block-level content is now called flow content.