ThredUP公司专营儿童服装交换，但其经营范围也涉及到从化妆品到电子游戏的各门各类。
Other groups have created barter economies. thredUP specialises in exchanging children's clothes, but also has exchanges for everything from make-up to video games.
根据经济学的一般理论，论证了赋予邮政一定范围专营权的必要性。在此基础上探讨了邮政专营权的范围以及邮政专营权同邮政普遍服务的关系。
The paper proves the necessity of monopoly power endowed with China post, discusses the limits of monopoly power and its relationship with universal postal service.
服务范围专营海运、空运、海空联运直达世界各地。
Specialize in transport by sea, air transport, and sea sky, providing through transport directly to all parts of the world.
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