A free enterprise economy is based on the principle of voluntaryassociation and exchange.
私有经济的基础是自发联合和交换。
2
The well-known Baking Club sold homemade biscuits while the Art VoluntaryAssociation sold their decorative jelly bottles.
小有名气的烘焙社出售美味的自制饼干,而艺术社出售自己创作并装饰的星空瓶。
3
The International Air Transport Association (IATA) is a voluntaryassociation of international airlines that sets routes, fares and other standards of service.