名词
中文翻译：太阳黑子周期
同义词：
['solar cycle', "sunspot cycle例句：1. The sunspot cycle is a crucial factor in determining the Earth's climate.（太阳黑子周期是决定地球气候的关键因素。）"]
例句：
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1. The sunspot cycle is a crucial factor in determining the Earth's climate.
太阳黑子周期是决定地球气候的关键因素。
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2. This solar cycle has been unusually active this year.
这个太阳周期今年异常活跃。
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3. The sunspot cycle affects the length of the day and the amount of sunlight reaching the Earth's surface.
太阳黑子周期影响白天的长度和到达地球表面的阳光量。