“planetary nebula”的概念、定义、翻译、参考文献-科学参考

单词	planetary nebula
释义	planetary nebula Encyclopedia 理学行星状星云释 planetary nebula行星状星云其中心有一向白矮星过渡的热星，且由稀薄电离气体组成有明晰边缘的小圆面状星云。星云为该中心星所抛出，正向外膨胀，并由中心星的紫外辐射照射而发光。 Physics 交叉学科天体物理学 planetary nebula行星状星云 Astronomy planetary nebula缩写：PN。行星状星云
随便看	rural informatization rural infrastructure rurality ruralization of urban area rural labor rural labor mobility rural land rural land circulation rural land consolidation Rural land contract Rural Land Contract Law rural land contract right rural land finance rural land management right rural land ownership rural land property right adjustment rural land property system rural land reform rural landscape rural landscape planning and design rural land securitization rural land use rights rural land-use structure Rural left-behind rural library

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。