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	undoubted undoubtedly undreamed of undress undressed undue undulate undulating undulation unduly undying unearned unearth unearthliness unearthly unease uneasily uneasiness uneasy uneducated unelected unemotional unemployed unemployment unemployment benefits

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