By the 16th century, a pendulum clock had been devised, but the pendulum swung in a large arc and thus was not very efficient.

到了16世纪，人们发明了摆钟，但钟摆摆动的幅度很大，因此效率不高。

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Unlike the original form used in early pendulum clocks, the anchor escapement permitted the pendulum to travel in a very small arc.

与在早期摆钟中使用的原始形式不同，锚擒纵装置允许钟摆沿非常小的弧线运动。

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In education, the pendulum has swung back to traditional teaching methods.

教育界又恢复了传统教学法。

《牛津词典》

"The Fall of the House of Usher" and "The Pit and the Pendulum."

VOA: special.2009.02.02

who shift the pendulum,who focus more on their strength, are not only happier,they are also,on the long run, more successful.

改变那个比率的人，更注重优点的人，不仅更开心，从长远来看他们也，更成功。

哈佛公开课 - 幸福课课程节选

Despite that fact,I argue that we need to shift the pendulum and do more "positive research",or in other words, research that focuses on what works.

尽管如此，我还是认为我们该改变那比率,做更多“积极研究“，或者说，集中研究可行的事。

哈佛公开课 - 幸福课课程节选

You get a sense that the pendulum has swung too far in the other direction.

WHITEHOUSE: President Obama Takes Questions from Senate Democrats

Unfortunately, liberal defenders of unemployment benefits swing the pendulum too far in the other direction.

FORBES: Blame the Unemployed, At Least a Little

The inflation driven exhilaration proves fleeting as the pendulum swings back like a wrecking ball.

FORBES: You Call It Inflation, I Call It Theft