“HⅡand HⅠ I regions”的概念、定义、翻译、参考文献-科学参考

单词	HⅡand HⅠ I regions
释义	HⅡand HⅠ I regions Encyclopedia 理学星际物质释 HⅡand HⅠ I regionsHⅡ区和HⅠ区以氢（电离氢或氢原子）为主要成分的星际气体云。又称电离氢区和中性氢区。
随便看	security check for important political figures security check hall security check of large-scale events security check room of museum security check system security clearance security command and control center of museum Security Committee of Chinese Society of Museums security continues education security control security control of power system security controls of rock engineering Security Council of the United Nations security department of museum security digit security domain security education method security exceptions in GATT security filter security HMI environmental engineering Security Housing security incident security informatics security inspection on transportations security investment

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