| 单词 | primum mobile |
| 释义 | Word Frequency primum mobile Latin (ˈpraɪmʊm ˈməʊbɪlɪ) noun 1. a prime mover 2. astronomy the outermost empty sphere in the Ptolemaic system that was thought to revolve around the earth from east to west in 24 hours carrying with it the inner spheres of the planets, sun, moon, and fixed stars Word origin C15: from Medieval Latin: first moving (thing) |
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