babble
发表于 2025-3-30 09:51:18
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懒惰民族
发表于 2025-3-30 13:30:15
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胡言乱语
发表于 2025-3-30 19:11:28
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厌倦吗你
发表于 2025-3-30 22:17:13
The Nature of Light and Matter: Fundamentals of Spectral Analysis,l constituents, and the spectrum analyzed. The following sections provide a survey of the theory of spectra and the objects, instruments, and several methods of analysis which are accessible to amateur astronomers.