递归的系统分解和从抽象到具体的转换。
Recursive system decomposition and transformation from the abstract to the concrete.
同时，认识还有一个从抽象到具体的飞跃，即把握具体真理。
At the same time, cognition also has leap from the abstract to the concrete, and grasps concrete truth.
案例教学是一个从具体到抽象，从抽象到具体的双向思维过程。
Case system is a two-way thought process, from concrete to abstract and from abstract to concrete.
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