说明：电离层对高频电波吸收衰减的影响研究
说明：基于层次分析法对岳城水库脆弱性的分析与评价_张春红
说明：世界人口迁移率
说明：探索语言传播规律——李宇明
说明：DETECTION OF OCEAN REFLECTED GPS SIGNALS THEORY AND EXPERIMENT
说明：Phenomenological Vector Model of Microwave Reflection from the Ocean
说明：Radiative transfer in the earths atmosphere and ocean influence of ocean waves
说明：Realistic real-time rendering of ocean waves
说明：A-Two thousand million
说明：C-an artificial divide