“diurnal arc”的概念、定义、翻译、参考文献-科学参考

单词	diurnal arc
释义	diurnal arc [dī`ǝrn·ǝl `ärk] ^ASTRONOMY That part of a celestial body's diurnal circle which lies above the horizon of the observer.
随便看	photon emission spectrum photonephelometer photoneutrino photoneutron photon flux photon gas photon-gated material photon microscope photon sail photon theory photonuclear reaction photoperiodism photophilic photophobia photophobic photophore gland photophoresis photophosphorylase photophosphorylation photophygous photopic vision photopigment photopolymer photopositive photoproton

科学参考收录了103327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。