例句
英汉词典释义
英英词典释义
  • Noun
    1. the first light of day;
    "we got up before dawn""they talked until morning"
    2. an atmospheric phenomenon consisting of bands of light caused by charged solar particles following the earth's magnetic lines of force
行业词典
  • 体育: 曙光女神式;
    地球物理学: 极光;
    大气科学: 极光;由于太阳粒子流轰击高层大气气体使其激发或电离的彩色发光现象, 常在高纬地区高空出现。;
    天文学: 极光;行星高磁纬地区大气中产生的彩色发光现象。外来的高能带电粒子流沿行星固有磁场进入两磁极与高层大气的气体分子和原子碰撞,形成极光。;