SYSTEMB: This J2EE project simulates system B.

SYSTEMB：此 J2EE 项目模拟系统 B。

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SYSTEMA: This J2EE project simulates system a.

systema：此j2ee项目模拟系统A。

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Illustrating with the teaching method of Mechanical Engineering Control Basis course in mechatronics major, this paper demonstrated system case teaching method which simulates system practice.

机械控制工程基础是机械设计与机械制造类专业的一门必修专业主要基础课。

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But a new model that simulates the birth and evolution of planets shows that conditions need to be just, just right to get a solar system like ours.

NPR: What Makes Our Solar System Special?