“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	resource management system resource manufacturing management resource market allocation resource mobilization theory resource monopoly price resource of space resource ownership resource plan allocation resource planning resource planning management Resource Policy resource pool resource portfolio allocation resource production scheduling resource property right price resource property rights allocation resource protectionism resource purchasing resource ratio hypothesis resource record resource recycling resource regeneration resource register resource registration resource reservation

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。