bottom margin

Left-Increase the generated box's top margin so that the top border edge is below the bottom margin edge of any left float boxes generated from previous source elements.

left-增加所生成框的上边框，以便上border edge处于由之前的源元素所生成的任一左浮动框的底margin edge之下。

Text that appears in the bottom margin of printed pages, such as a document title, page number, or data.

在有印刷文字的页面底部空白处出现的文字，如文件标题、页面号码或日期等。

The corporation's bottom line is a good profit margin.

公司的基本要求是好的利润.

Corrosion in Margin Plate of Oil Tank Bottom

油罐底部边缘板的腐蚀与防护

On the vertical dimension, we distribute extra space in a ratio of ( 1,4,2) corresponding to ( top margin, button itself, bottom margin).

在垂直方向上，按照与（上边距，按钮本身，下边距）对应的（1，4，2）的比例分配额外空间。

Notice how the top margin of the second paragraph is extended vertically to meet the bottom margin of the previous paragraph.

请注意第二个段落的上边框是如何垂直扩展以便与前一段落的底边框相接的。