real number

名词 real number:

1. any rational or irrational number
   同义词：real

1. A set having the same number of points as all the real numbers in an interval.
   闭联集与一个区间内所有实数数目相同的点的集合
2. An expression that is the sum of a real number and a vector and that contains four terms, one real and three imaginary.
   四元数一实数和一矢量的和的表达式，有四个项，一个为实数项，另外三个为虚数项