单词	cycloaddition
释义	cycloaddition noun cy·​clo·​ad·​di·​tion ˌsī-(ˌ)klō-ə-ˈdi-shən  : a chemical reaction leading to ring formation in a compound Word History First Known Use 1963, in the meaning defined above
随便看	odd man odd man out pre-op pre-opening pre-operational pre-order pre-ordered pre-ordering pre-orders pre-owned pre-paste pre-pasted pre-pasting pre-performance pre-pill pre-plan pre-planned pre-planning pre-portion pre-portioned pre-portioning pre-prepared pre-presidential pre-price pre-priced

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。