柯林斯詞典rational number 1. N any real number of the form a/b, where a and b are integers and b is not zero, as 7 or 7/3 有理數(shù) 返回 rational number劍橋詞典a number that can be expressed as the ratio of two whole numbers （數(shù)學(xué)中的）有理數(shù) 比較irrational number 返回 rational number