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

单词	thorium
释义	tho·ri·um \ˈthōrēəm, ˈthȯr-\ noun (-s) Etymology: New Latin, from Thor, Norse god of thunder + New Latin -ium : a radioactive tetravalent metallic element that occurs combined in minerals (as monazite and thorite) and usually associated with rare earths and principally as the isotope of mass number 232 having a half-life of 1.39 × 10¹⁰ years and emitting alpha particles to form mesothorium 1, that is obtained by reduction of its compounds as a pyrophoric gray powder or a heavy malleable metal changing from silvery white to dark gray or black in air, and that is used chiefly with tungsten or nickel electrodes in gas-discharge lamps and for conversion to fissionable uranium of mass number 233 by the absorption of neutrons and gamma rays — symbol Th; see actinium series, thorium series, uranium series; see element table
随便看	wealthless wealthy wean weanedness weanel weaner weanie weanling weanly weanyer weapon weapon weaponeer weaponless weaponry weapons weapon salve weapons carrier weaponshaw weaponshawing weaponshow weaponshowing weaponsmith wear wear

英语词典包含332784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。