Contrast is an explanatory method that compares two things and phenomena with the same or different categories to illustrate the characteristics of things. Explain that some abstract or unfamiliar things can be compared with concrete or familiar things, so that readers can get a concrete and vivid impression through comparison. The characteristics of things often appear in comparison. When comparing, you can compare things in the same category or different categories, and you can make "horizontal comparison" or "vertical comparison" of things.
Extended data:
It is often difficult to explain the characteristics of things unilaterally. According to the similarities and differences of shapes, properties, causes and functions of things, things can be divided into several categories, and then explained one by one according to the categories. This method of explanation is called classification.
Function: clear organization, clear hierarchy and clear at a glance. The characteristics of the object are clearly explained, which makes the article more convincing.
For example, screens are divided into gold screens, silver screens, gold screens, painted screens, stone screens, wooden screens and bamboo screens. According to the gorgeous degree of their building materials, they are different in art, and also reveal the different economic and cultural levels of users.