名词
中文翻译：Unknown
同义词：
['average rotation', 'mean revolution', 'average revolution']
例句：
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1. The meanrotation of the Earth is about 24 hours.
地球的平均自转周期约为24小时。
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2. The team needs to calculate the mean rotation of the projectile to determine its trajectory.
团队需要计算弹道导弹的平均旋转来确定其轨迹。
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3.The mean rotation of the planets around the sun is a key factor in determining their orbits.
行星围绕太阳的平均旋转是确定其轨道的关键因素。