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 sunspot ['sʌn`spɑt]   添加此单词到默认生词本
n. 太阳黑子, 雀斑



    sunspot
    [ noun ]
    a cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic field
    <noun.phenomenon>


    1. Solar Max cost $77 million to build and launch in February 1980, at a time of maximum activity in the sun's 11-year sunspot cycle. Its mission was to study solar flares.
    2. It will take about a week for the sunspot group to move out of view from Earth and it could produce more major flares.
    3. "There was a stunning view of that large sunspot group," Krupp said.
    4. Magnetic storms occur about six times every 11-year sunspot cycle, while flares erupt three or four times annually during the active phase of the sunspot cycle, Cohen said.
    5. Magnetic storms occur about six times every 11-year sunspot cycle, while flares erupt three or four times annually during the active phase of the sunspot cycle, Cohen said.
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