名词
中文翻译：主要惯性轴
同义词：
['principal axis', 'principal axis例句：1. The principal axis of the planet is perpendicular to its orbit plane.（行星的主要惯性轴与其轨道平面垂直。）']
例句：
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1. The principal axis of the planet is perpendicular to its orbit plane.
行星的主要惯性轴与其轨道平面垂直。
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2. The principal axis of the Earth's gravity field is aligned with the North-South line.
地球的重力场的主要惯性轴与南北线对齐。
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3.The principal axis of the satellite's spin is aligned with its orbit plane.
卫星旋转的主要惯性轴与其轨道平面对齐。