由此他认识到，在紧急事件中，与医生和工程师的能力一样，作为通讯服务提供者的能力也是非常需要的。
He realised that his skills as a communications provider were as badly needed, in emergencies, as those of doctors and engineers.
服务请求者与服务提供者之间的通讯生命周期管理。
Management of the life cycle of a communication between service requester and service provider.
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