You define the business logic and the presentation logic in the queries.
在查询中定义业务逻辑和表示逻辑。
To make the page more dynamic, we separate the data and presentation logic.
为了使页面更具有动态性，需要分离数据与表示逻辑。
We assume here that presentation logic is less _valuable_ than the back-end business logic.
这里我们假设表示层逻辑不如后台的商务逻辑重要。
Presentation logic follows a similar pattern.
展示逻辑有类似的模式。
Presentation logic follows a similar pattern.
展示逻辑有类似的模式。
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