This is known as the sunspot cycle.
这是被称为太阳黑子周期。
A typical sunspot exists for just a few weeks.
一个典型的太阳黑子只存在几个星期。
This time miserable, and I like the white board on a sunspot so obvious.
这下惨了，我就像白棋盘上的一颗黑子这样明显了。
Conclusion: The sunspot has a certain influence upon hepatitis incidence.
结论：太阳黑子对肝炎发生率有一定的影响。
Sunspot activity is correlated with the total amount of energy we receive from the sun.
太阳黑子的活动性与我们从太阳那获得的总能量密切相关。
Sunspot activity is correlated with the total amount of energy we receive from the sun.
太阳黑子的活动性与我们从太阳那获得的总能量密切相关。
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