“calcium reversal lines”的概念、定义、翻译、参考文献-科学参考

单词	calcium reversal lines
释义	calcium reversal lines [`kal·se·ǝm ri`vǝr·sǝl ´līnz] ^SPECTROSCOPY Narrow calcium emission lines that appear as bright lines in the center of broad calcium absorption bands in the spectra of certain stars.
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