User Experience professionals often use state/transistion diagrams to describe the user experience. Bill believes that transitions are the most important element in the UX.
Bill还提到用户体验不像具体的事物那用容易展现，更多的是对时间的掌握，专家通常会使用状态或转换图表来描述用户体验，这也是用户体验中最重要的元素。
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