“ancient.sunspot observation”的概念、定义、翻译、参考文献-科学参考

单词	ancient.sunspot observation
释义	ancient.sunspot observation Encyclopedia 理学太阳物理学释 ancient.sunspot observation太阳黑子的古代观测在望远镜发明以前直接用肉眼观察日面上的黑子现象。在一般情况下，由于太阳光十分刺眼，看到这种现象的机会不多。但在日出或日落时，或在大雾笼罩或风沙弥漫的天气，日光减弱，就有可能看到日面上的大黑子。
随便看	Unified Chinese Characters List for Names of Some Measurement Units unified comprehensive coordination system in America Unified Content Descriptors unified electroweak theory unified field theories unified field theory unified gauge model unified government unified information portal system unified joint command system in China unified magnitude unified management of water resources in the basin unified management principle by profession unified management principle of party archives and government archives unified mass unit Unified Medical Language System，UMLS unified model unified modeling language unified modeling language, UML unified modeling language，UML unified model of active galactic nuclei Unified Parallel C unified peer-to-peer database framework unified peer-to-peer database framework, UPDF unified power flow controller

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。