单词	pentadiene
释义	pentadiene noun pen·​ta·​diene ¦pentə+ : any of several straight-chain liquid diolefins C5H8 especially : piperylene compare cyclopentadiene Word History Etymology penta- + -diene
随便看	hardhandednesses hardhats hardhead hardhead sponge hardheaded hardheadedly hardheadedness hardheadednesses hardheads hardheartednesses hardicanute hardie hardie hole hardier hardies hardiest hardihead hardihood hardihoods hardilier hardiliest hardily hardim hardiment hardiments

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。