| 单词 | Delaunay orbit element | 
| 释义 | Delaunay orbit element [dǝ·lō·nā `ȯr·bǝt ´el·ǝ·mǝnt]  MECHANICS In the n-body problem, certain functions of variable elements of an ellipse with a fixed focus along which one of the bodies travels; these functions have rates of change satisfying simple equations.  | 
	
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