The system is a distributed network application with multiple-tier architecture.

该系统是一个多层体系结构下的分布式网络应用。

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You can apply it to one tier in an architecture and to multiple tiers across the enterprise architecture.

你可以在架构中的一层上应用它，也可以在贯穿企业架构的多个层上来应用它。

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If the goal is to tie together a complicated business process across multiple requests, then state management should reside on the business tier.

如果目标是将跨多个请求的复杂业务过程联系在一起，那么状态管理应该在业务层上进行。

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The Queen's speech is likely to propose an end to the multiple-tier appeal system for asylum seekers, replacing it with a single level of adjudication.

BBC: Call for radical asylum changes

Many auditors were fired over rising Sarbanes-Oxley fees and some companies switched from Big 4 to next tier, some multiple times, chasing lower fees and an auditor that would go easier on them.

FORBES: Auditor Rotation Proposal Just More Spin