Big Ben's timekeeping is strictly regulated by a stack of coins placed on the huge pendulum.

大本钟的计时是由放置在巨型钟摆上的一堆硬币严格调节的。

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Most people think of this London landmark as Big Ben, but Big Ben is actually the name of the largest bell inside this pendulum clock.

大多数人都认为伦敦的标志是大本钟，其实大本钟只不过指的是威斯敏特宫的大摆钟里面的那个巨型铃钟而已。

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Analysts said winning Facebook would have helped swing the pendulum in the Big Board operator's favor in terms of recruiting future listings and potential transfers.

WSJ: Facebook to List on Nasdaq

Then the key issue facing investors is how the political pendulum swings in response to the aborting of economic recovery and the new big setback to asset prices.

FORBES: Despair and Hope Beyond Chairman Bernanke's Monetary Cliff