There are three different levels of description for macroscopic physical systems: macroscopic level using thermodynamics and continuum mechanics, mesoscopic level by the kinetic theory, and microscopic level by statistical mechanics of many-particle systems. The search for possible links bridging among these levels is the core part of the Hilbert Sixth Problem. Through a concrete example, we explain the links and also the main idea of Rational Extended Thermodynamics.

中文翻译：

---

合理的扩展热力学：动力学理论与连续论之间的联系

宏观物理系统的描述有三种不同的层次：使用热力学和连续力学的宏观层次，通过动力学理论的中观层次和通过多粒子系统的统计力学的微观层次。寻找这些层次之间可能存在的联系是希尔伯特第六题的核心部分。通过一个具体的例子，我们解释了这些联系以及理性扩展热力学的主要思想。