| 单词 | active sun |
| 释义 | active sunnoun Astronomy.the sun at a maximum of solar activity, occurring every 11 years. solar activity, superimposed on an unchanging background. Compare quiet sun, solar cycle. Origin of active sunFirst recorded in 1975–80 Words nearby active sunactive safety, active service, active shooter, active site, active splint, active sun, active transport, active vocabulary, active voice, activewear, activin Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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