名词
中文翻译：主要运动
同义词：
['main motion', 'primarymotion']
例句：
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1. The mainmotion of the planet is its rotation aroundits axis.
行星的主要运动是围绕其轴的旋转。
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2. The main motion of theteam was to win the championship.
队伍的主要运动是赢得冠军。
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3. The main motion ofthe car is its acceleration and deceleration.
汽车的主要运动是加速和减速。