单词	cycloaddition
释义	cycloaddition /ˌsʌɪkləʊəˈdɪʃ(ə)n / noun Chemistry An addition reaction in which a cyclic molecule is formed.Nitrone cycloaddition and retro-aldol reactions have also been applied to the total synthesis of morphine.... The photochemical reaction pathways of the different cycloadditions were explored on the basis of TD-DFT calculations using the Gaussian 98 implementation of the method developed by Scuseria and co-workers. Interplanar angles of 40.5 and 39 have been found in the 5-ethoxypsoralen-thymine and 5-butoxypsoralen-thymine photoproducts, respectively, where the cycloaddition occurs at the pyrone ring.
随便看	patristical patristically patristicism patristics patrix patroclinous Patroclus patrol patrolatry patrol boat patrol box patrol car patrolette patrol leader patroller patrolman patrol officer patrological patrologist patrology patrol wagon patron patronage Patronage Secretary patronal

英语词典包含243303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。