Tail margin: White space below the text area of a page. Also called Foot margin.

脚白边：书页内，在版芯下边的空白部分，亦称地脚。

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By a lopsided margin, Democrats joined with opposition Republicans to send a message to the White House.

VOA: standard.2009.05.21

Mentholated cigarettes account for roughly 30 percent of cigarettes sold in the United States, and they are favored by African-American smokers by roughly a threefold margin compared to white smokers.

FORBES: Will Removing Menthol From Cigarettes Improve Health?

Consider the case of Florida, the state that put George W. Bush in the White House by a margin of fewer than 300 votes out of the five million plus that Floridians cast that year.

FORBES: Why Defense Cuts Could Doom Obama's Re-election Bid

Despite drawing some bipartisan report, the margin would not be sufficient to override a White House veto.

FORBES: Magazine Article