名词
中文翻译：Unknown
同义词：
['major axis', 'principal radius例句：1. The major radial of the planet is its distance from the sun.（行星的主要径向是它与太阳的距离。）']
例句：
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1. The major radial of the planet is its distance from the sun.
行星的主要径向是它与太阳的距离。
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2.The major radial of the satellite is its orbit around the earth.
卫星的主要径向是它围绕地球的轨道。
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3. The major radial of the star is its distance from the center of the galaxy.
恒星的主要径向是它与银河中心的距离。