(d) Where there is only one source capable of providing the required service, such as when the provision of the service requires the use of intellectual property, trade secrets or other exclusive rights owned or possessed by a certain person or persons;
(d) 只有一个来源能够提供所需服务，例如这种服务的提供需要使用属某人所有或由某人占有的知识产权、商业秘密和其他专属权利；