To allow a dome to rest above a square base, either of two devices was used: the squinch (an arch in each of the corners of a square base that transforms it into an octagon) or the pendentive.

最独特的特点是圆屋顶，要让圆屋顶安置于方形基础上，可利用两种方式：内角拱(方形基础每个角落的拱门变为八角形)或穹隅。

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Pendentives make possible support of the dome on a square framework of four huge equal arches resting on huge piers.

穹隅尽可能地支撑着四个巨大的相等的拱形组成的正方形框架之上的圆屋顶，停留在巨大的墩上。

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The advantages of two different structural types can be fully developed by combining the single-layer spherical dome and the double-layer square pyramid space grids into a new structural type.

在大跨结构中，将单双层网壳结合起来形成的一种结构形成———周边双层中部单层球面网壳结构，可充分发挥两种结构形式的优点。

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The containment dome of the first reactor is designed to withstand pressures of only 7 pounds per square inch, compared with 50 psi in American-style reactors, leaving the Juragua dome exponentially weaker than an American reactor even in the event that the dome functions perfectly as designed, an unlikely prospect in the current situation.

CENTERFORSECURITYPOLICY: A Chernobyl reminder just off our shores

At the top is a new restaurant which offers visitors one of the greatest panoramas of London, past the pepperpot dome of the National Gallery, over Lord Nelson's shoulder in Trafalgar Square and on to the Palace of Westminster.

ECONOMIST: Museum sponsorship