Market demand is a stochastic variable which brings difficulty for most profit by ordering right goods.
市场需求量是一个随机变量，它给订货者追求最大利润，确定最优订货量带来了困难。
The wind velocity is the sole important meteorological factor in the formula calculating wind energy, it is a stochastic variable.
风速是风能计算中十分重要的气象因子，它是一随机变量。
Usually you want every instantiation of a distribution to represent an uncorrelated stochastic variable, which means that you should a new engine for each one.
通常你要分配的每个实例化代表着不相关的随机变量，这就意味着你应该为每一个新的引擎。
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