[] a piece of a machine or structure零件；部件◆They have difficulty getting parts for their ageing machinery.他们很难为那部老机器找到零部件。◆a manufacturer of aircraft parts飞机零部件制造商●take ˈpart (in sth)to be involved in sth参加SYNparticipate ➡ idiom at play verb, sum nounspare part