The User Interface layer runs in the web tier.

用户界面层在 Web 层中运行。

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There should not be any affinity between the web tier, application tier and the database tier.

Web层，应用层和数据库层之间不应该有任何交叉。

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The Spring Framework to replace the Controls framework - Spring supports accessing local or remote EJBs from the application web tier

使用 Spring Framework替代Controls framework——借助于Spring可以从应用的Web层 访问本地或远程的EJB。

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Instead of relying on electronic distributors, Smith approaches second- and third-tier Web sites that offer free games and gimmicks, paying them a fee (depending on the number of different visitors).

FORBES: Mr. Manners

During the demonstration of RAD for the Server, Dave Mendlen, Visual Studio product planner, built what he called a "middle-tier business object" for a wine-selling Web site using six lines of code, an operation that he said would take "hundreds of lines of code" with the current version of Visual Basic 6.

CNN: Technology - Gates offers developers glimpse of Next Generation Windows