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单词 Foucault pendulum
释义 Foucault pendulum
[fü`kō `pen·jǝ·lǝm]
MECHANICS
A swinging weight supported by a long wire, so that the wire's upper support restrains the wire only in the vertical direction, and the weight is set swinging with no lateral or circular motion; the plane of the pendulum gradually changes, demonstrating the rotation of the earth on its axis.
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