Detailed analysis: "Books are the ladder of human progress" is Gorky's famous saying. This sentence compares the book to a ladder, which vividly shows the great role of the book in human beings.

Introduction metaphor:

Metaphor is a common rhetorical device, which describes or explains things with things B similar to things A. The famous literary theorist jonathan kalle defines metaphor as a basic cognitive way, which is realized by treating one thing as another. That is to say, finding the * * * similarity between things A and B, we find that things A contain unknown characteristics in things B, and we have a new understanding of things A that is different from usual. According to the way of description or explanation, metaphor can be divided into direct metaphor, metaphor, analogy, metonymy, duality, metaphor and metaphor. There are ten categories: simple metaphor, detailed metaphor, quoted metaphor and virtual metaphor.