单词	protractor
释义	protractorprotractor /proʊˈtræktɚ, prə-/ noun [countable] math, geometry an instrument, usually in the shape of a half-circle, used for measuring and drawing angles
随便看	op-ed open open-air open-and-shut case open bar open circulatory system open door policy open-ended opener open-eyed open-faced sandwich open figure open-handed openhandedness open-hearted open-heart surgery open house opening opening hours opening night opening time open letter openly open market open-market

英语词典包含48224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。