The system is designed as a two-tier system with an app tier running the J2EE application and a load-balancer tier.

这个系统设计成两层的系统，运行J2EE应用程序的应用程序层和负载平衡器层。

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Still, the fake cloud approach does not address the scalability issues inherent in a two-tier system.

但是，伪造云途径不能解决两层系统固有的可伸缩性问题。

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Some have suggested that a two-tier system may provide the only viable solution.

某些人则建议一个双层的系统可能能提供唯一可行的方案。

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There are complaints about the two-tier system of coverage, and some believe that people with private insurance get quicker and better care, and are therefore healthier.

VOA: standard.2009.09.28

The Labour frontbencher warned the plan would "corrupt university admissions with a two tier system - one for the best qualified applicants, another for those with access to fatter cheque books".

BBC: Minister rules out 'university places for the rich'

The union also wanted the introduction of a single pay arrangement for cabin crew staff, rather than the existing two tier system, with staff who joined after 1997 being paid less than those employed before that date.

BBC: The deal came after 120 hours of negotiations

In its School Organisation Review, Suffolk County Council is replacing the three-tier system of primary, middle and secondary schools with the two-tier system which cuts out the 40 middle schools.

BBC: Suffolk's middle schools closure programme starts