“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	risk assessment index risk assessment method for working conditions risk assessment of anti-terrorism risk assessment of biological invasion risk assessment of cancer risk assessment of chemical substance risk assessment of compounds without threshold level risk assessment of compounds with threshold level risk assessment of cross-species infection risk assessment of enhancement and releasing in fishery risk assessment of environmental health risk assessment of geological hazards risk assessment of potential losses caused by invasive species risk assessment of social stability for urban rail transit risk assessment of soil pollution risk assessment of space radiation Risk Assessment Procedures risk assessment services risk assets risk attitude risk averse risk aversion risk avoidance of resource development risk based inspection risk based inspection for mechanical system

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