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。
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。
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borderedge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。
Right - Increase the generated box's top margin so that the top border edge is below the bottom margin edge of any right float boxes generated from previous source elements.
right-增加所生成框的上边框，以便上borderedge处于由之前的源元素所生成的任一右浮动框的底margin edge之下。
Right - Increase the generated box's top margin so that the top border edge is below the bottom margin edge of any right float boxes generated from previous source elements.
right-增加所生成框的上边框，以便上borderedge处于由之前的源元素所生成的任一右浮动框的底margin edge之下。
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