构造模型进行预测的关键在于确定模型参数，在土壤溶质运移模型中一般包括弥散系数和延迟因子两个参数。
The key to establish model and predict lies in the determination of model parameters, which include generally dispersion coefficient and retardation factor.
在豚鼠—大鼠异种心脏移植中，给以眼镜蛇毒因子以避免发生超急性排斥反应，制作延迟性排斥反应模型。
In guinea pig to rat heart xenotransplantation model, cobra venom factor is administrated to avoid hyperacute rejection, and thus delayed xenograft rejection model is made.
结果表明开关的半导体片对照射激光的吸收因子增大了开关的延迟时间，在计算中应该加以考虑。
The results show that the absorption fraction of the semiconductor slab of the switch increases the delay time of switches and should be considered in the calculation.
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