“Ring Nebula”的概念、定义、翻译、参考文献-科学参考

单词	Ring Nebula
释义	Ring Nebula Encyclopedia 理学行星状星云释 Ring Nebula环状星云位于天琴座的典型的行星状星云。星表中的编号为M57和NGC6720。位于北天区，距离地球2300光年，目视星等8.8，半径约1.3光年。由于面向地球呈环状结构，并处于明亮的织女星以南，长期以来备受关注。 Astronomy Ring Nebula指环星云
随便看	production planning Production Planning and Control System production planning and scheduling production planning and scheduling for mineral processing production planning and scheduling optimization production planning execution system production planning management production planning system production platform production population production price production process production process in ecosystem production process inspection production process of hard-cover binding single machines production process of light olefins production process of vinyl chloride by calcium carbide method production process of vinyl chloride by ethylene method production process quality control production procurement production profile logging production progress meeting production purpose of socialism production rate production rate of furnaces in metallurgical industry

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。