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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Outside my open French doors, a 15-foot grass margin led to the edge of a cliff, 160 feet below which the Pacific Ocean pounded the beach.

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There were 43 cars in the 500 mile race and the winning margin was one foot with eight cars crossing the finish line nearly at the same time.

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With rising apparel sales, gross margin and sales per square foot are headed up, vital trends for any retailer.

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