“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	township level comprehensive planning township-level tax collector township musical township planning township public finance township records township seat planning townships with distinct characteristics township treasury Townspeople Uprising in New Granada Townsville town-village settlements system town-village system town（rural）construction planning Towolhoe to work wonders towpath of Shanyin county tow-to-top process towveyor toxemia and septicemia toxic and harmful contaminants monitoring toxic and harmful gas detection alarm toxic and harmful grass toxic and non-toxic toxicant

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。