本图是简单星型模型设计图，中间是一张事实表，还有其相关维度，本例中是促销活动、产品、时间。

The diagram shows a simple star schema design with one fact table in the middle and its related dimensions, in this case, promotions, products, and time.

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赵彦春教授高度赞扬了张星的本次陈述，认为她走在学科的领先地位，其研究具有学术前沿性。

Then Professor Zhao highly commended Zhang's statement, and thought her research made difference to the study.

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