propagationl传播propagationn.增殖；繁殖；传播；传送propagation of disease[医] 疾病传播propagation loss model传播损耗模型propagation prediction传播预报propagation phenomenon传播现象propagation difference传播路程差propagation regularity传播规律propagation power loss传播功率损失propagation delay path传送延时通道propagation of culture文化传承propagation plane wave传播波