... 太阳活动(性) solar activity 太阳活动区 active region of the sun 太阳活动物理学 physics of solar activity ...
双语例句
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The largest activeregion seen on thesun since 2005 has rotated to the center of the sun's face, as seen from earth-which means any eruptions it produces will be aimed right at us.
Spicules line the above frame of solar activeregion 11092 that crossed thesun last month, but are particularly evident converging on the sunspot on the lower left.