词典释义：
a monumental structure with a square or triangular base and sloping sides that meet in a point at the top, especially one built of stone as a royal tomb in ancient Egypt
金字塔；锥形塔，方尖塔（尤指古埃及的石砌王室墓）。
an object, shape, or arrangement with such a form
金字塔状物体（或形状、排列）
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a pyramid of logs 堆成金字塔状的圆木
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[as modifier]
a pyramid roof .金字塔形的屋顶。
【几何】 角锥（体），棱锥（体）
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a threesided pyramid. 三面棱锥。
【剖】 锥体。
an organization or system that is structured with fewer people or things at each level as one approaches the top
金字塔形组织（或体系）
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the lowest strata of the social pyramid. 金字塔形社会体系的最底层。
(
金字塔式台球。
a system of financial growth achieved by a small initial investment, with subsequent investments being funded by using unrealized profits as collateral
金字塔式控股。
a form of investment in which each paying participant recruits two further participants, with returns being given to early participants using money contributed by later ones
金字塔式投资方式。
heap or stack in the shape of a pyramid
〈主北美〉 把…堆成尖塔（或角锥）形
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debt was pyramided on top of unrealistic debt in an orgy of speculation. 本已债台高筑，一阵疯狂的投机后更是雪上加霜。
achieve a substantial return on (money or property) after making a small initial investment
在（小投资）上获得丰厚的收益。
"late Middle English （in the geometrical sense）： via Latin from Greek
