This is where all business rules are applied as data passes from the Presentation Layer (UI), through the business Layer to the data Access Layer, and back again.

当数据从表示层(ui)传递过来的时候，全部的业务规则都在这里执行，通过业务层到数据访问层，然后再倒过来。

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Learn how to jump ahead or back to a certain slide, without having to go through the entire presentation.

学会如何不用浏览整个演示文稿而跳跃到某一张具体的幻灯片。

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The solution is to separate the presentation logic of the front end from the business logic of the back end, but they still need to be connected.

解决的办法是将前端的表示逻辑与后端的业务逻辑相分离，但是它们仍旧需要相互连接。

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In one presentation, the curtains were drawn back during the presentation to reveal a pregnant woman getting an ultrasound test.

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Every year the Queen visits a cathedral to make the presentation on Maundy Thursday in a ceremony that dates back to the 13th century.

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The orders came back to push ahead with the project - or "presentation" as Ahmed Ali described it.

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