这个随机变量可以取不同的值。

This random variable can take different values.

统计学中，随机变量是一个重要的概念。

In statistics, a random variable is an important concept.

我们需要计算这个随机变量的期望值。

We need to calculate the expected value of this random variable.

在概率论中，随机变量是一个数值函数。

In probability theory, a random variable is a numerical function.

这个实验的结果可以用一个随机变量来表示。

The outcome of this experiment can be represented by a random variable.

一个随机变量关于另一个随机变量的三角多项式的最佳逼近；

The best approximation of trigonometric polynomial about another random variable for function of a random variable;

随机变量函数被随机变量三角多项式最佳逼近的阶。

The best approximation order of trigonometric polynomial for function of random variable.

基于随机变量的数学期望与方差, 讨论随机变量数字特征的几个不等式.

Based on random variable expectation and variance, some inequalities are proved.

然后把模糊变量转化为当量随机变量，用传统可靠性理论中的随机抽样法模拟零件的可靠度；

Secondly, the fuzzy variable is transformed to an equivalent random variable, and the reliability of parts is calculated by the random sampling method.

在一定条件下，满足上述两个性质的随机变量是正态变量。

This paper puts forward to: Under the specific condition, the random variable that can satisfy the above two natures is the normal variable.