“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	water lifting irrigation water lifting machinery in ancient China water light pollution water lily water-lily family waterline water-line section water-logged compost water logging waterlogging waterlogging control calculation waterlogging control planning waterlogging design waterlogging disaster waterlogging disaster in China Waterloo Bridge water loop heat pump system water loss water loss and soil erosion of highway water loss rate of steam heat-supply system Water lotus water-loving water management water management in ancient China water management in field

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。