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	firewall firewater firewood firework firing line firing squad firm firmament firmly firmness firmware first first aid first-aid kit First Amendment First Amendment, the first base First Battle of Bull Run, the firstborn first class first-class First Continental Congress, the first cousin first-degree first derivative test

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。