According to probability principle of multiplication, the survival rate was the product of retention rate at certain period and survival rate at the previous period.
根据乘法概率法则，将某一年龄段的留存率与前一年龄段的生存率相乘可得该年龄段的生存率。
There is a high prevalence rate of early childhood caries(ECC), and it results from a multiplication of risk factors, including different hosts, microorganisms and inappropriate behaviors.
儿童早期龋（ECC）的患病率一直居高不下，其发生是宿主因素、生物学因素和行为因素等多因素作用的结果。
The analysis of this model shows that if the interelectrode gap length in the CCM elements decreases, the rate of the charge multiplication increases.
通过对该模型的分析表明：ccm单元内电极间的间隙越小，电荷倍增率越大。
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