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黑子
hēi​zǐhēi​zi

black piece

Definitions Defs Origin Strokes Stroke Words Sentences Sents
  • 太阳黑子 tài​yáng​hēi​zǐ sunspot
  • 太阳黑子周 tài​yáng​hēi​zǐ​zhōu sunspot cycle