propagationl传播propagationn.增殖；繁殖；传播；传送propagation of distributions分布传播propagation of back pressure反压前传模式propagation path obstruction传播通道阻挡propagation over mixed paths通过混合路径的传播Propagation Prediction Report传播预测报告propagation model calibration传播模型校正propagational characteristics传播特性Propagation Technology of AMF丛枝菌根真菌的增殖技术Propagation in the atmosphere大气传输propagation time in echo path回声路径传播时间

1. The imperfectness of the actual open groove structures will cause electromagnetic mode conversion and increase the propagation loss.
   实际沟道结构的不完全性将引起电磁模式的转换，增加传播损耗。