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 low level radioactivity was easily removed from affected personnel by washing with soap and water.
用肥皂水洗浴之后很容易就消除了17名机组人员身上的核辐射。
The measuring method of low level radioactivity were used because the sample is often very less and the radioactivity is frequently very low.
由于进行多金属结核与结壳研究测量样品的量较少，其中的放射性核素含量很低，所以要用低水平放射测量方法完成分析测量工作。
The measuring method of low level radioactivity were used because the sample is often very less and the radioactivity is frequently very low.
由于进行多金属结核与结壳研究测量样品的量较少，其中的放射性核素含量很低，所以要用低水平放射测量方法完成分析测量工作。
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