noun 下载 🔗分享 太阳黑子 A region on the sun's surface with a lower temperature than its surroundings and intense magnetic activity. Examples : "Scientists study sunspots to better understand the sun's magnetic field and its impact on Earth. " 科学家研究太阳黑子,以便更好地了解太阳的磁场及其对地球的影响。 astronomy physics space weather nature science phenomena 与AI对话词汇游戏阅读练习