反向電離層散射 ionospheric scatter: 電離層散射器backward scatter: 背散射forward propagation ionospheric scatter: 電離層前向散射; 前向傳播電離層散射ionospheric scatter communication: 電離層散射通信ionospheric scatter propagation: 電離層散射傳播下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯