“高频返回散射”的概念、定义、翻译、参考文献-科学参考

单词	高频返回散射
释义	高频返回散射 Encyclopedia 工学短波传播释 high-frequency backscattering高频返回散射斜向入射到电离层的高频段（3～30兆赫）无线电波，经电离层反射（可能多次）后因地面地形不平坦和电气不均匀性而向四面八方散射的现象。其中一小部分电波能量沿相反方向（路径可与以前相同或不同），由电离层反射折回到地面电波发射点。
随便看	crossing beam crossing-belt sorting machine crossing brackets crossing brackets, CBs crossing-category word Crossing in the Same Ferryboat crossing line crossing number crossing point crossing sequence crossing speed for turnout crossing straight lines crossing symmetry crossing the desert problem Crossing the North of the Yellow River Crossing the Yangtze River Campaign Memorial Hall (Anhui Celebrity Museum) crossing time cross-in-square cross interferometer cross-invertible loop cross isomorphism cross junction cross-language e-commerce Cross-Language Evaluation Forum ,CLEF cross language information retrieval

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。