| 单词 | Wolf number |
| 释义 | Wolf number /woolf/; Fr. /vawlf/, Astron. a number indicating the degree of sunspot activity on the sun as a factor of observer idiosyncrasies, the number of sunspot groups, and the number of individual sunspots. Also called relative sunspot number, sunspot number. [1975-80; after Rudolf Wolf (1816-93), Swiss astronomer] |
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