首页  英汉  汉英  英英  词组  用法  例句  同义词  写作  俚语  缩写  词源  词根  法汉  德汉  日汉  俄汉  韩汉  西汉  意汉  泰汉  越汉

单词	Perkin reaction
释义	Perkin reaction noun Per·​kin reaction variants or less commonly Perkin synthesis ˈpərkə̇n- : a reaction for making an unsaturated aromatic acid (as cinnamic acid) by heating an aromatic aldehyde with an acid anhydride (as acetic anhydride) in the presence of a base (as sodium acetate or potassium carbonate) Word History Etymology after Sir William Henry Perkin †1907 English chemist
随便看	hoofprint hoofprints hoofrot hoofs hoofs (it) hoofs it hoogaars hoogh hooghly hook hook and eye hook and ladder hook and ladder truck hook bolt hook bones hook check hook climber hook gage hook into hook ladder hook money Hook of Holland hook order hook pass hook rope

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。