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单词	protractor
释义	pro·trac·tor (prō-trăktər, prə-) n. 1. A semicircular instrument for measuring and constructing angles. 2. Anatomy A muscle that extends a limb or other part.
随便看	sileni silent silent auction silent butler silently silent mutation silentness silent partner silent treatment silenus Silenus silesia Silesia Silesian silex silhouette silic- silic- silica silica gel silicate siliceous silici- silicic silicic acid

英语词典包含135693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。