The test engine layer will add support for distribution and running tests in parallel; random ordering of tests and Transactional test behavior.
测试引擎层将支持分布式与并行测试运行方式，乱序测试以及事务式测试行为。
By introducing application supporting layer, the model is able to support running various pre-existing applications in a secure operating environment.
在模型中增加应用支持层，实现在安全增强的操作系统环境下灵活支持已有应用程序。
The model consists of five layers which are environment support layer, running platform support layer, physical management layer, mapping layer, and application layer.
该模型分为五个层，即：环境支持层、运行平台支持层、物理管理层、映射层和应用层，并具体讨论了每一层的功能和开发方法。
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