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