With different tracers, they are equivalent only in the number of grain, but not equivalent in the sampling probability.
对不同的示踪剂，仅在颗粒数量上等效，在抽样概率上是不等效的。
It may determine whether one should choose nonprobability sampling or probability sampling.
它可以决定一个人应该选择非概率抽样还是概率抽样。
The simulation is categorized as a sampling method because the inputs are randomly generated from a probability distribution that stands in for a real data population.
模拟是按照采样方法分类的，因为输入是根据代表真实数据总体的概率分布而随机生成的。
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