This is obviously a major simplification of the real physical system, but the hope is that it captures enough of the physics to provide useful insight.

这是在真实物理系统里面很明显的一个简化，但是它抓住了足够的物理特征，给人们提供了很有用的信息。

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Because a logical or physical model is an abstraction of the real-world system, it is usually very complicated, and it consists of many building blocks and relationships.

由于逻辑或物理模型是现实中的系统的抽象，它通常非常复杂，由很多构建块和关系组成。

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The proposed algorithms are used to detect the OPN models of AGV physical object and OCPN model of WuXi FMS real- time control system.

同时利用提出的算法，对AGV物理对象OPN模型及无锡职业学院FMS中构造的OCPN模型进行了死锁分析。

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Movie rentals marks an extension of the credits system beyond virtual goods to real services, and (who knows) could potentially lead to physical goods.

FORBES: Now You Can Rent And Stream Movies On Facebook