This article traces back to three trends of Vitruvius’ mechanics: theoretical geometry, practical geometry and mechanics, which origin from the same heritage of scientific intentions of Alexandria, is to demonstrate his empirical judge to the rational proportion is a resonance of an intelectual tradition and Roman reality rather than exclusive consequence of an import Greek harmonic cosmology.%本文追溯维特鲁威机械学的三个来源:演绎几何学、实用几何学和机械学,在亚历山大科学传统中的表现与意图。意在说明维特鲁威和谐机械学的起源与传承。
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