nutation 

  1. 名詞
垂頭, 下垂
下俯, 點頭
(軸的)章動
/以上可為可數與不可數名詞/
/複數為"nutations"/
限定不可數名詞:
點頭病

    
                        
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例句

                

                    
    
                                                    
  1. 
                                Since 1.70, we used nutation model IAU 2000.                            
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  2. 
                                See also Nutation (astronomy and mechanics) ; Precession of equinoxes .                            
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  3. 
                                A motion in which the second Euler angle changes is called " nutation ".                            
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                                These rotations are called precession, nutation , and intrinsic rotation (spin).                            
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  5. 
                                Nutation ( true equinox of date) . A short-period oscillation of the vernal equinox.                            
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