(~s)
Sunspots are dark cool patches that appear on the surface of the sun and last for about a week.
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(~s)
Sunspots are dark cool patches that appear on the surface of the sun and last for about a week.
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Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012