directional duality principle

例句：

1. 1. The directional duality principle is a fundamental concept in the study of physics.
   方向双重性原理是物理学研究中的一个基本概念。
2. 2. This principle has been applied to various fields, such as economics and management.
   这一原理已被应用于经济学和管理学等多个领域。
3. 3. By understanding the directional duality principle, we can better understand the relationship between causeand effect.
   通过理解方向双重性原理，我们可以更好地理解因果关系之间的关系。