In the measurement of low-level radioactivity, instead of Poisson distribution, a negative binomial distribution is proposed to denote the probability distribution of actual counts.
在低水平放射性测量中，建议采用负二项式分布代替泊松分布来描述真实测量计数的几率分布。
The tension Poisson ratio is negative, and its regression curve shows upward section and downward section.
受拉泊松系数回归曲线存在上升段和下降段；
The tension Poisson ratio is negative, and its regression curve shows upward section and downward section.
受拉泊松系数回归曲线存在上升段和下降段；
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