名词
中文翻译：有效地球半径
同义词：
['effective radius', 'effective radius of the earth']
例句：
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1. The study of the effective earth radius is crucial for understanding the Earth's gravity field.
研究有效地球半径对于理解地球的重力场至关重要。
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2.The planetary scientists have been working on improving the measurement of the effective earth radius.
行星科学家们一直在努力改进有效地球半径的测量。
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3.The effective earth radius is a key factor in determining the size and shape of the planet.
有效地球半径是确定行星大小和形状的关键因素。