I. Explanation:
Come down in one continuous line means that the same lineage and faction are handed down from generation to generation. Metaphor refers to the inheritance relationship between some thoughts, behaviors or theories. This idiom is often used to describe the inheritance and development of a certain culture, concept and skill in the long history. Among them, "one pulse" refers to a pulse of inheritance, and "inheritance" refers to the continuation and inheritance of this inheritance.
For example, Confucianism in China's traditional culture is in the same strain. From Confucius and Mencius to Dong Zhongshu and Zhu, these thinkers are constantly inheriting and developing Confucianism.
Second, the source:
The idiom "come down in one continuous line" comes from a famous saying in ancient China, "come down in one continuous line, come down in one continuous line". Used to describe an idea, culture, tradition, etc. In the process of inheritance, it has always maintained a continuous feature without interruption or loss.
This idiom can be traced back to a sentence in Mencius wholeheartedly: "The way of Confucius comes down in one continuous line, from the way of Yao Shunyu to the king of Tang Wen, the king of Wu, the duke of Zhou and Confucius." Confucius' ideological system comes down in one continuous line, from Yao Shunyu's thought in Tang Dynasty to King Wen, Duke Zhou and Confucius.
Examples of the same strain
1. Although these two paintings are quite different in style, they come down in one continuous line in composition and color, and both come from the same school.
2. His research comes down in one continuous line with predecessors' work and has made great contributions to the development of science.
The cultures of these two countries come down in one continuous line and have profound historical origins.
His thoughts and behaviors are in the same strain as the family tradition, and he is very conservative.
Although these two papers have different views, they are in the same strain in research methods.