短語詞組短語delivery cost ratio 運送成本比率frame delivery ratio 幀投遞率;網(wǎng)絡的基於幀投遞率channel sediment delivery ratio 河道泥沙輸移比sediment delivery ratio sdr 泥沙輸移比Data delivery ratio 報文投遞率sediment -delivery ratio 沉積物輸送比值sediment delivery ratio 泥沙輸移比;遞移率Packet Delivery Ratio 分組成功投遞率sedimentation delivery ratio 泥沙輸移比 返回 delivery ratio