英语词汇“astronomical twilight”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	astronomical twilight
释义	astronomical twilight astronomical twilight See: twilight. astronomical twilight astronomical twilight See twilight. astronomical twilight [‚as·trə′näm·ə·kəl ′twī‚līt] (astronomy) The period of incomplete darkness when the center of the sun is more than 6° but not more than 18° below the celestial horizon. astronomical twilight The period before sunrise and after sunset when sun's center is between 12° and 18° below sea-level horizon. This may be regarded for all practical purposes as synonymous with complete darkness. MedicalSeetwilight
随便看	northward northwardly northwards north warning system north warren regional middle school north warwickshire and hinckley college north warwickshire borough council north warwickshire council for voluntary service north warwickshire district association north warwickshire volunteer bureau north waterloo farmers mutual north water polynya study northway community trust north wayne insurance agency north wayne village library northway virus north weald bridleways association north weald flying group north webster youth league north wei north weld county water district north wellington health care north west north-west northwest

英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。