Astronomy. Of the sun, or a region of it, or a part of the solar cycle: marked by the presence of (a large number of) sunspots, and typically also…
| 单词 | θ898 |
| 释义 | the world > the universe > sun > solar activity > [adjective] > radiation (2) active1882 Astronomy. Of the sun, or a region of it, or a part of the solar cycle: marked by the presence of (a large number of) sunspots, and typically also… quiet1897 Astronomy. Of the sun, a region of it, or a part of the solar cycle: not especially active; spec. marked by the absence (or a minimal number) of… |
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