“环状星云”的概念、定义、翻译、参考文献-科学参考

单词	环状星云
释义	环状星云 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 annular nebula; ring nebula环状星云
随便看	Nathanael West Nathan Alterman Nathaniel Culverwell Nathaniel Gist Gee Nathaniel Hawthorne Nathan Marwirakuwa Shamuyarira Nathan Milstein Nathan Mortimore Newmark Nathan Shaham Nathan Söderblom Nathan the Wise Nathan Yonathan Nathan Zach nation National "10th Five-Year" Program for Environmental Protection National"11th Five-Year Plan"for Environmental Protection National "12th Five-year Plan" for Ecological Conservation National "12th Five-Year" Plan for Environmental Protection National 1∶50000 Database Updating Project National "9th Five-Year" Plan for Environmental Protection and Vision 2010 Targets National Aboriginal and Torres Strait Islander Health Plan National Aboriginal Congress National Aboriginal Consultative Committee National Academic Symposium on High-pitched Opera of China National Academy of Art

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。