名词中文翻译
中文翻译：副弧
同义词：
['sub-circle', 'sub-arc']
例句：
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1.The subarc of the planet is about 20,000 miles long.
地球的副环大约长20,000英里。
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2.The subarc of the moon's orbit is about 22,000 miles wide.
月球轨道的副环大约宽22,000英里。
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3.The subarc around the sun is known as the heliosphere.
围绕太阳的副环被称为日球层。