sunspot number

• 黑子数

sunspot number的用法和样例：

例句

1. An increase in the number of sun flares leads to an increase in the number of sunspots, and a decrease in the number of sun flares leads to a decrease in the number of sunspots.
   太阳闪烁次数增加导致太阳黑子数增加，太阳闪烁次数减少导致太阳黑子数的减少。
2. An increase in the number of sun flares leads to an increase in the number of sunspots, and a decrease in the number of sun flares leads to a decrease in the number of sunspots.
   太阳闪烁次数增加导致太阳黑子数增加，太阳闪烁次数减少导致太阳黑子数的减少。