高品质的服务要靠设计和管理，但服务的无形性、不可分割性、易变性和易逝性都说明服务设计比产品设计更为复杂。
The high quality service is depends on the design and management, but the service design is sophisticated than product design because intangibility, inseparability, variability, perishability.
服务是图书馆的主要使命，图书馆服务具有无形性、同时性和双重性。
Service is the main mission of the library with the intangible, simultaneous and dual nature.
服务性企业经常面临如何最好的向顾客传递无形的服务质量上的困扰。
Service firms often are confronted with the problem of how to communicate the intangible qualities.
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