| 单词 | tumbling | 
| 释义 | tumbling [`tǝm·bliŋ]  AEROSPACE ENGINEERING An attitude situation in which the vehicle continues on its flight, but turns end over end about its center of mass.  ENGINEERING A surface-finishing operation for small articles in which irregularities are removed or surfaces are polished by tumbling them together in a barrel, along with wooden pegs, sawdust, and polishing compounds.  MECHANICAL ENGINEERING Loss of control in a two-frame free gyroscope, occurring when both frames of reference become coplanar.  | 
	
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