“north American nebula”的概念、定义、翻译、参考文献-科学参考

单词	north American nebula
释义	north American nebula Encyclopedia 理学发射星云释 north American nebula北美星云位于天鹅座尾部的发射星云。《星云星团新总表》中的编号为NGC7000，因其形似北美洲大陆而得名。
随便看	gas retort carbon gas-rich asteroid gas-rich meteorite gas-rich satellite gas safety device gas scintillation proportional counter gas scintillation proportional detector gas scintillator gas scrubber gas seepage gas self-inducing bioreactor Gassendi crater gas sensing device gas sensing device, gas sensor gas sensing electrode gas-sensing electrode gas-sensitive ceramics gas sensitive element gas sensitive membrane electrode gas-sensitive membrane electrode gas sensor gas sensory semiconductor materials gas separating and filtering gas separation by hydrate gas separation membrane

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