单词	right ascension
释义	right ascension noun : the arc of the celestial equator between the vernal equinox and the point where the hour circle through a given body intersects the equator reckoned eastward commonly in terms of the corresponding interval of sidereal time in hours, minutes, and seconds Example Sentences Recent Examples on the Web Declination and right ascension are the two primary axes of the celestial sphere. Reece Rogers, Wired, 19 Dec. 2021 Word History First Known Use 15th century, in the meaning defined above
随便看	gum guaiac gum guaiacum gum juniper gum kino gum mastic gum olibanum gum plant gum pocket gum resin gum rosin gum Senegal gum shiraz gum spirits gum spot gum succory gum thus gum tragacanth gum tree gum turpentine gum up gum up (something) gum up something gum up the works gum-bichromate gum-dichromate

英语词典包含469781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。