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N the second brightest star in Perseus, the first known eclipsing binary. Visual magnitude: 2.2–3.5; period: 68.8 hours; spectral type (brighter component): B8V 大陵变星; 英仙座第二个最亮的星
N
N a computer programming language designed for mathematical and scientific purposes; a high-level language 计算机算法语言
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