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.
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。
It firstly extracts several target candidates through the preprocessing including median filtering, edge extraction, sea-sky line detection and morphological filtering of infrared sequence images.
通过对红外序列图像进行中值滤波、边缘提取、海天线检测和形态滤波等预处理，提取出若干个候选目标。
The trees in the Embankment garden stood bulky against the incandescent Sky-line.
河堤花园里的树木背衬着灯光燃炽的夜空巍巍屹立。
The trees in the Embankment garden stood bulky against the incandescent Sky-line.
河堤花园里的树木背衬着灯光燃炽的夜空巍巍屹立。
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