由于雨滴或雾滴对阳光有折射分光作用，使空中太阳对面出现的一道有七色光谱的弧。
An arc of all seven spectral colors appearing in the sky opposite the sun as a result of the refractive dispersion of sunlight in drops of rain or mist.
经典系列具有可以神奇般折射光线的坚实的半弧型，非常独特。
The Classic series is unique for its magic of refracting light in bold half-arc.
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