precessional 

  1. 形容詞
歲差的, 因歲差而導致的

    
                        
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例句

                

                    
    
                                                    
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                                One full precessional wobble takes 23,000 years.                            
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                                A change in the earth's polar axis could even alter the length of the precessional cycle.                            
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                                These oscillations, in both precessional speed and axial tilt, are known as the nutation.                            
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                                The Holocene interglacial , or MIS-1, is now 11,500 years old, or half a precessional cycle.                            
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                                The Platonic year is the length of time required for one complete precessional rotation: about 25 800 years.                            
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