“Orion nebula”的概念、定义、翻译、参考文献-科学参考

单词	Orion nebula
释义	Orion nebula 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	fixed roof tanks erection fixed roof tanks for oil storage fixed rule fixed sample Fixed sample group survey fixed sandy land fixed satellite fixed screen fixed set fixed set-point regulatory systems fixed ship loader fixed simplex fixed singularity fixed singular point fixed solution fixed sphere fixed spherical mirror Fixed spherical Radio telescope fixed spherical radio telescope fixed spherical reflector fixed star fixed state measurement fixed step size fixed subgroup fixed-sum insurance

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。