短語詞組短語occultation band 掩帶lunar occultation [天]月掩星;月掩星觀測(cè)技術(shù)grazing occultation [天]掠掩Occultation E 掩星現(xiàn)象ionospheric occultation 電離層掩星Occultation technology 電離層掩星instrument occultation 月掩星觀測(cè)儀occultation time 掩食時(shí)刻occultation event 掩星事件 返回 occultation