Learn English free online - how to pronounce word in English - English Learning Online- www.pronounceword.com






D Region
  • 英语发声
  • 美语发声
  • n. the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves

    同义词: D-layer

  • 网络释义

    1、d区
    D区

    短语

    d connected region labeling三维连通标记

    limited d proportionality region有限正比区

    Buried d diffusion region隐埋扩散区

    field d oxide region场氧化区

    d-region stabilityd域稳定性

    d-regiond层

    Sound d shadow region声影区

    D - regionD区

    d face region extraction三维人脸提取

    专业释义

    英英释义

    D Region

    n.the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves

    同义词:D-layer




    英汉双解大词典

    D region (alsoDlayer)

    • 1.  

      N(名词) the lowest region of the ionosphere, extending from a height of about 60 kilometres to about 90 kilometres: contains a low concentration of free electrons and reflects low-frequency radio waves D域; 电离层的最低区域 → see also ionosphere