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发射星云
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发射星云
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发射星云
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emission nebula
发射星云
受附近高温恒星的紫外辐射激发而发光的亮星云,其光谱中包含发射线。是气体星云的一种。又称弥漫发射星云。
Astronomy
emission nebula
发射星云
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approximate analysis of laminar flame
approximate analytic methods in nonlinear vibration
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