黑子相对数 （relative number of sunspot;relative number of spots），即 沃尔夫数 (Wolf number) ：
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黑子相对数 relative number of spots; relative sunspot number; wolf number; wolf-wolfer nu ..
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wolf sunspot number 沃尔夫数
wolf relative number 沃尔夫相对数
·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
Wolf predicts the number of mobile TV subscribers worldwide will reach 462 million by 2012, up from a mere 23.8 million today.
FORBES: Magazine Article
Wolf notes that Apple plans to grow the number of Chinese stores it operates to 25 from 3 over the next three years.
FORBES: To See Apple's Most Awesome Stores You'll Have To Leave The United States
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