Little 发表于 2025-4-1 03:37:04

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Epidural-Space 发表于 2025-4-1 09:34:16

Introduction,he sense of vision. Smoke signals during the day, and fires at night, have been used in many cultures to transmit warnings about enemy movements, the outcome of battles, etc. For example, it is known that fire signals were extensively used by the armies of the Roman empire .
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查看完整版本: Titlebook: Spectral Evolution of Galaxies; Proceedings of the F Cesare Chiosi,Alvio Renzini Conference proceedings 1986 D. Reidel Publishing Company,