bottom margin

基本解释

Most block-level elements have a bottom margin of 20px.
絕大多數塊級別的元素的底部邊距爲20px。
Notice how the top margin of the second paragraph is extended vertically to meet the bottom margin of the previous paragraph.
請注意第二個段落的上邊框是如何垂直擴展以便與前一段落的底邊框相接的。
On the vertical dimension, we distribute extra space in a ratio of (1, 4, 2) corresponding to (top margin, button itself, bottom margin).
在垂直方曏上，按照與（上邊距，按鈕本身，下邊距）對應的（1，4，2）的比例分配額外空間。

Not exactly--Nortel was looking at shedding the low-margin bottom of its optical-components business, saving the jazziest lines for itself.
FORBES: Lighting up Nortel
None is a true bottom-line margin that relates profits to sales after deducting all costs, including the opportunity cost of equity capital.
FORBES: Are You Being Misled By Profit Margins?
However, our gross margin and bottom line have been impacted by worse than anticipated market conditions and inventory provisions.
FORBES: JA Solar Slides On Weak Q2, Reduced 2011 Guidance