英语词汇“penumbral waves”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	penumbral waves
释义	penumbral waves penumbral waves [pə′nəm·brəl ′wāvz] (astronomy) Waves that are often observed to propagate outward across the penumbrae of large sunspots when the penumbrae are viewed in the light of the Hα spectral line of hydrogen.
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