sunspot
柯林斯词典
1. N-COUNT Sunspots are dark cool patches that appear on the surface of the sun and last for about a week. 黑子; 日斑
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sunspot /ˈsʌnˌspɒt/ (sunspots)
剑桥词典
- a dark spot on the surface of the sun that appears for a few days or weeks and then disappears
太阳黑子 返回 sunspot