There could also be "old" and "new" versions of one or more core systems in place to serve these different applications, along with different mid-tier services.

一或多个核心系统的“新”“旧”版本可能同时存在以服务于不同的应用程序，以及不同的中间层服务。

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These client applications, often called fat-client solutions, still access business-tier EJBs and EIS-tier services hosted by Geronimo, like their thin-client counterparts.

这些客户机应用程序通常称为胖客户机解决方案，仍访问由geronimo托管的业务层ejb和eis层服务，与其瘦客户机对应物一样。

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But what happens when the architecture insists that the code that performs the validation must come from a services tier?

但是，如果架构坚持执行验证的代码必须来自一个服务层，那么会发生什么呢？

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While the EDS acquisition cemented HP's spot in the top tier of information technology services firms, trailing only IBM, analysts had anticipated big cuts as HP integrated EDS' offerings with its own services arm.

FORBES: Magazine Article

Where services are collectively consumed, we will transfer power over those services to the lowest practical tier of government, opening up provision to social enterprises, private companies and community organisations.

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Third, and most important, patients may be harmed when services are prioritised economically in single-tier health-care systems like Canada's.

ECONOMIST: Letters | The