“猎户座大星云”的概念、定义、翻译、参考文献-科学参考

单词	猎户座大星云
释义	猎户座大星云 Encyclopedia 理学发射星云释 Orion nebula猎户座大星云位于猎户座的发射星云。用肉眼观察，猎户座中构成“宝剑”的有三颗星，中间一颗是较模糊的亮斑，它不是单颗星，而是一个星云，即猎户座大星云（星表编号为M42和NGC1976）。
随便看	eco-livable city ecological adaptation ecological aesthetics ecological agricultural techniques ecological amplitude ecological and environmental effects of irrigation and drainage ecological and environmental monitoring information release system ecological and environmental risk assessment ecological and environment mineral material ecological anthropology ecological appraisal system ecological aquaculture ecological aquaculture types Ecological Art Education ecological assessment ecological assets ecological auditing ecological-based forest harvesting ecological benefits of soil and water conservation ecological biochemistry ecological capital ecological carrying capacity ecological characteristics of fish populations ecological civilization ecological civilization view

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。