英语词汇“θ69429”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

单词	θ69429
释义	the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > hydrocarbon radicals > bivalent radicals (6) ethylene1853 The divalent hydrocarbon radical —CH2CH2—. Chiefly attributive, in names of chemical compounds (cf. compounds). ethylidene1859 The divalent hydrocarbon radical  CHCH3. Usually attributive or a formative element in chemical names. propylidene1876 The divalent hydrocarbon radical  CH·CH2CH3. Usually attributive or a formative element in chemical names. pentamethylene1887 (a) the cyclic hydrocarbon cyclopentane, C5H10 (now rare); (b) the divalent straight-chain radical —(CH2)5—, present in pentamethylenediamine. vinylidene1898 The bivalent radical CH2 = C<; frequently attributive. Cf. polyvinylidene, n. isopropylidene1900 the bivalent radical (CH3)2C=, frequently introduced into compounds by reaction with acetone.
随便看	scape-spring scape-tyburn scape-wheel scaped scapedoor scapegallows scapegoat scapegoated scapegoater scapegoating scapegoatings scapegoatism scapegoatisms scapegoats scapegrace scapegraces scapel scapeless scapement scapements scapepipe scapes scapesermon scapespring scapethrift

英语词典包含1132095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。