名词
中文翻译：Unknown
同义词：
['average solar year', "average solar year例句：1. The length of a mean solar year varies from 365.25 to 366.2 days.（一个平均太阳年的时长从365.25天到366.2天不等。）2. The Earth's rotational period is about 365.25 days", 'which is the mean solar year.（地球的自转周期大约是365.25天，这是平均太阳年。）']
例句：
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1. The length of a mean solar year varies from 365.25 to 366.2 days.
一个平均太阳年的时长从365.25天到366.2天不等。
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2. The Earth's rotational period is about 365.25 days, which is the mean solar year.
地球的自转周期大约是365.25天，这是平均太阳年。
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3. The calendar system used in many countries is based on the mean solar year.
许多国家的日历系统基于平均太阳年。