“sky wave propagation for low frequency”的概念、定义、翻译、参考文献-科学参考

单词	sky wave propagation for low frequency
释义	sky wave propagation for low frequency Encyclopedia 工学电离层电波传播释 sky wave propagation for low frequency低频天波传播地面发射的频率为30～300千赫的无线电波，经电离层反射再回到地面的传播方式。
随便看	stroma cell stroma lamella stroma thylakoid stromatin stromatolite biofilm stromatolites stromatolitic structure Stromatoporoid strombus Strong strong strong acid strong acid type ion exchanger strong additivity strong adjunction strong adjunction functor Strong Anthropic Principle strong approximation strong approximation scheme strong approximation theorem strong Artin conjecture strong axiom of continuity strong axiom of infinity strong Baer radical strong band of semigroups

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