Review an old friend and get a new detailed explanation:

"Reviewing the past and learning the new" means learning and reviewing the previous knowledge repeatedly, while "learning the new" means gaining new knowledge and understanding from it. Therefore, the whole idiom emphasizes that reviewing and reviewing old knowledge can help us discover new things or understand new ideas. In academic, scientific research or daily life, this view is very practical, emphasizing the importance of repeated learning and practice.

Review old friends and learn about new resources:

This idiom comes from The Analects of Confucius. The Analects of Confucius is a record of the words and deeds of Confucius and his disciples, and a Confucian classic, which reflects Confucius' thoughts and the social situation of his time. There is a saying in the "Governing the Country" section of The Analects of Confucius: "Reviewing the past and learning new things can be a teacher."

Here, Confucius emphasized the importance of getting new knowledge by reviewing past knowledge, and also hinted that this learning method is particularly important for teachers, because teachers need to review knowledge repeatedly to teach students.

Review an old friend and learn a new example:

1. Although we are constantly advancing in the process of pursuing new knowledge, the purpose of learning the old is to better understand the basic concepts and establish a profound subject foundation.

2. Efficient learning methods include reviewing the past and learning the new, and consolidating the learning results by reviewing the previous course materials, so as to better prepare for new knowledge challenges.

3. The education system needs to emphasize new values while imparting new knowledge, so as to help students build lasting learning skills and knowledge systems.

For historians, studying past events is a necessary step to put forward new historical explanations and theories.

In the field of technology, programmers often need to review the past and learn the new, and learn the old version of programming language or technology again to adapt to the changing industry needs.

6. Learning from the old is not only the requirement of traditional disciplines, but also the experts in the field of scientific research need to constantly review the old experimental results to discover new research directions and discoveries.