| 词汇 | precession | 
| 释义 | precession  noun [ U ]  physics specialized uk/prɪˈseʃ.ən/ us/prɪˈseʃ.ən/  (行星的)进动 the slow and continuous change in the rotation (= movement around a fixed point) of a planet, star, etc. that is spinning around another planet, star, etc. | 
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