英语词汇“compact h ii region”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	compact h ii region
释义	compact H II region compact H II region [′käm‚pakt ′āch ′tü ‚rē·jən] (astronomy) A region of dense ionized hydrogen in interstellar space, not greater than 1 parsec (1.9 × 10¹³ miles or 3.1 × 10¹³ kilometers) in diameter.
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compact H II region