Read Edit View history 太阳黑子周 tàiyánghēizǐzhōu sunspot cycle Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 太阳黑子周/ 太陽黑子周 tàiyánghēizǐzhōu sunspot cycle 太阳黑子周的平均长度约为11年。 Edit Delete References Add reference No references for this word.