短語(yǔ)詞組短語(yǔ)proper r fraction 真分?jǐn)?shù)rational proper fraction function 有理真分式函數(shù)theory of proper fraction 真分?jǐn)?shù)理論rational proper fraction [數(shù)]有理真分式echter Bruch proper fraction 真分?jǐn)?shù) 返回 proper fraction