单词	ortho ester
释义	ortho ester noun : an ester of an ortho acid especially : an ester RC(OR′)3 (as orthoformic ester) of an ortho-carboxylic acid Word History Etymology ortho entry 1
随便看	sectism sectist sector sector disk sector gate sector gear sector of a sphere sector wheel sectoral sectored sectored disk sectorial sectoring sectors sectrales sectrals sects sectuary secty secular secular arm secular canoness secular games secular humanism secular humanist

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。