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单词	parfocal
释义	parfocal adjective par·​fo·​cal ˌpär-ˈfō-kəl  : being or having lenses or lens sets (such as eyepieces) with the corresponding focal points all in the same plane parfocality ˌpär-fō-ˈka-lə-tē  noun parfocalize ˌpär-ˈfō-kə-ˌlīz  transitive verb Word History Etymology Latin par equal + English focal First Known Use circa 1886, in the meaning defined above Medical Definition parfocal adjective par·​fo·​cal (ˈ)pär-ˈfō-kəl  : having corresponding focal points all in the same plane : having sets of objectives or eyepieces so mounted that they may be interchanged without varying the focus of the instrument (as a microscope) with which they are used
随便看	Dordrecht dore of seville dore roosevelt national park Dore, Monts doree dorees dores dorey dorf reaction dorff illusion Dorgeles dorhawk dorhawks doria Dorian Dorian mode Dorian tetrachord dorians Doric Doric mode Doric tetrachord doriccer doriccest doricer doricest

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。