Aurora lights shimmering over Earth were filmed on camera by Russia's space agency Roscosmos cosmonaut Sergey Kud-Sverchkov from the International Space Station. The phenomenon is caused by solar storms emitting high-speed charged particles colliding with gases in Earth’s atmosphere. The most common colour seen during this display is green, although other colours such as pink and red are sometimes visible as well.
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Hurdle Word 2 AnswerBROOD，更多细节参见heLLoword翻译官方下载
缺点：容易饱和（输入过大或过小时梯度接近0，导致梯度消失）