名词
中文翻译：恒定力轴
同义词：
['moment of inertia', 'moment of inertia axis']
例句：
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1. The axisof the planet's rotation is perpendicular to its orbital plane.
行星的旋转轴与其轨道平面垂直。
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2.The axis of symmetry is located at the center of the object.
对称轴位于物体的中心。
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3. The axis of rotation is the line around which an object rotates.
旋转轴是围绕其旋转的物体的轴线。