名词
中文翻译：重力轴
同义词：
['gravitational axis', 'gravity vector', 'gravity direction']
例句：
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1. The gravity axisof the planet is determined by its mass and distance from the sun.
行星的重力轴由其质量和离太阳的距离决定。
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2.In space exploration, understanding the gravity axis is crucial for navigation.
在太空探索中，理解重力轴对于导航至关重要。
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3.The gravity axis of a satellite can be used to determine its orbital parameters.
卫星的重力轴可以用来确定其轨道参数。