The new column has a header cell at the top, a data cell in the middle, and a footer cell at the bottom.
新列在顶部拥有一个头单元，中部的一个数据单元，以及底部的一个底单元。
If you look at the body of the HTML page near the bottom of the listing, you see that this header is literally in a header tag-one of the new HTML elements in HTML 5.
如果您查看清单3底部附近的HTML页面主体，您将看到这个标题实际上位于一个header标记中—这是HTML5中的一个新HTML元素。
Finally, our header method draws a two-point black line all the way across the page's content area at the bottom of the header.
最后，我们的Header方法在标题的底部绘制了一条两点黑线，一直穿过页面的内容区域。
Furthermore, to gain more depth, we can switch the color to black and do the same thing just in the bottom part of the header. Give it a try!
假如想更有层次感，你还可以把颜色调为黑色，然后在头部区底部重复同样操作。
One approach is to add an element to the bottom of the header that has a clear: both property.
一种方式是向具有clear：both属性的头的底部添加一个元素。
A header or footer is a single line of text that prints near the top or bottom of every page.
页眉或页脚是打印在每一页的顶部或底部附近的单行文本。
The at least one web extends vertically from at least one of the top and bottom of the header pipe and is connected to the flange.
至少一个腹板从集管管道的顶部和底部中至少一个竖直延伸并连接到凸缘上。
Two imitating boards which installed on the bottom of two side of header can adjust to stubble height according to different ground condition.
割台两侧底部设置仿形板，可根据不同地面状况调整割茬。
Two imitating boards which installed on the bottom of two side of header can adjust to stubble height according to different ground condition.
割台两侧底部设置仿形板，可根据不同地面状况调整割茬。
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