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law of areas

資料來源 : WordNet®

law of areas
     n : a law concerning the speed at which planets travel; a line
         connecting a planet to the sun will sweep out equal areas
         in equal times; "Kepler's second law means that a
         planet's orbital speed changes with its distance from the
         sun" [syn: {Kepler's second law}, {law of equal areas}]
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