“Spörer minimum”的概念、定义、翻译、参考文献-科学参考

单词	Spörer minimum
释义	Spörer minimum [`spǝr·ǝr `min·ǝ·mǝm] ^ASTRONOMY A period of low sunspot activity that occurred between 1420 and 1570.
随便看	jet-effect wind jet engine jet-flame drill jet flap jetfoil jet fuel jet hole jet-membrane method jet mill jet mixer jet molding jet nozzle jet-piercing drill jet propulsion jet pump jetsam jet spinning jet streak jet stream jetting jetting tool jettison jet tones jetty Jevons effect

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