当模型的语义内容发生变化时，描述变化的语义元素的主题图也随之进行调整。

As the semantic content of the model changes, the Topic diagrams that depict the changed semantic elements will adjust accordingly.

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该方法充分结合系统的定性知识和定量数学描述信息，实现了参数大范围变化时变系统的良好控制。

Combining the qualitative knowledge and quantitative mathematical information of system, the approach provides good control over the nonlinear time varying system with wide variation of parameters.

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So, we can use Coulomb's force law to think and it does that, it tells us the force is a function of that distance. But what it does not tell us, which if we're trying to describe an atom we really want to know, is what happens to the distance as time passes?

来考虑这两个粒子之间的,它告诉我们力随距离的函数关系,但它不能告诉我们，而我们如果要描述,原子又非常想知道的是,距离随时间的变化时怎样的？

麻省理工公开课 - 化学原理课程节选