系统测试阶段使用视频图像发生器，对所有的设计功能进行了相关测试。
At the phase of system test, the video image generator is used for examining all related designed functions.
由于系统结构设计不当造成的系统性能瓶颈不易发现，往往到最后的系统测试阶段才被暴露。
System performance bottlenecks which caused by unsuitable system architecture design hard to discover until the last system integration test phase.
模型是基于失效间隔时间的较理论化的可靠性增长模型，用于软件系统测试阶段的可靠性度量。
The Jelinski-Moranda(J-M) model is a theoretical software reliability growth model based on the time between failures.
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