我遇到一对刚刚从上海回来的美国夫妇，他们说上海的天际线美得如梦如幻。
I met an American couple from the States who just came back from Shanghai and they think the Shanghai skyline is like surreal.
当太阳靠近地平线，高空中悬浮的冰晶排列起来，就像菱镜一样折射日光，这个时候便形成了幻日。
They form when the sun is near the horizon and ice crystals high in the sky line up in a way that bends the solar rays like a prism.
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