“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	museum fire emergency rescue museum fire fighting system Museum for Overseas Chinese & Students in Soviet Union & Russia Museum for the Chinese medical history of the Chinese Medical Association Museum for the History of Chinese Medicine museum foundation museum gallery activities Museum Handbook Museum Handbook for Conservation of Iron Cultural Relics Museum Handbook for Conservation Technologie of Bronze Cultural Relics Museum History Journal museum hydrant system museum industrial management museum information technology system infrastructure museum intellectual property museum intelligent integration system museum intelligent system museum interactive experience area museum interpretation museum intruder alarm system Museum Island museum jurisdictional management museum laboratory museum leadership mechanism museum learning kit

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。