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单词 solar ultraviolet radiation
释义 solar ultraviolet radiation
[`sō·lǝr ¦ǝl·trǝ¦vī·lǝt ´rād·ē`ā·shǝn]
ASTROPHYSICS
That portion of the sun's electromagnetic radiation that has wavelengths from about 400 to about 4 nanometers; this radiation may sufficiently ionize the earth's atmosphere so that propagation of radio waves is affected.
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