平行轴定理（parallel axis theorem）能够很简易地，从刚体对于一支通过质心的直轴（质心轴）的转动惯量，计算出刚体对平行于质心轴的另外一支直轴的转动惯量。
利用复摆验证了刚体的平行轴定理。
The Parallel axis theorem of rigid body is verified with physical pendulum.
由两个转动定律导出了平行轴定理和柯尼希定理。
Parallel axis theorem and Knig theorem are deduced from the two laws of rotation.
摘要由两个转动定律导出了平行轴定理和柯尼希定理。
Parallel axis theorem and K? Nig theorem are deduced from the two laws of rotation.
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