英语词汇“hydrogen line”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	hydrogen line
释义	hydrogen line hydrogen line (21 cm line) See H I region. hydrogen line [′hī·drə·jən ‚līn] (spectroscopy) A spectral line emitted by neutral hydrogen having a frequency of 1420 megahertz and a wavelength of 21 centimeters; radiation from this line is used in radio astronomy to study the amount and velocity of hydrogen in the Galaxy. AcronymsSeehit list
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