“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	illumination illumination calculation illumination effect illumination homogenization illumination/illuminance illumination in horizontal direction illumination model illumination problem illumination quality illumination source illumination source of TV lighting fixtures illumination uniformity illuminator illumine illuminometer illusion illusion of control illusion of depth illusion theatre illusory illusory contour figure illusory correlation illusory perception illustrate Illustrated Annals of the Western Regions

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