虽然这些技术提供了杰出的方法来描述系统行为，但是它们不能传达真实的用户环境和界面需求的足够信息。
Although these techniques provide an excellent means to describe system behavior, they cannot convey adequate information on real users' environments and interface needs.
人物角色减少了对详细图形模型的需求，通过人物角色使用的叙述结构，能够更容易理解用户行为的很多细微差别。
Personas reduce the need for elaborate diagrammatic models; it's easier to understand the many nuances of user behavior through the narrative structures that personas employ.
情报用户需求与情报行为研究是情报学的一个重要研究领域。
Research on user's information requirements and information behavior is an important area in information service.
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