1, direct description: the characteristics or uses of sugar and salt are directly reflected in the name, such as "sweetness" and "salty rhyme".

2. Abstract moral law: express some characteristics or meanings of sugar and salt abstractly, such as "the sweet world of sugar" and "the taste of salt in the sea".

3. Image metaphor: use image metaphor to describe the characteristics or uses of sugar and salt, such as "sugar is as sweet as honey" and "salt tastes like the sea".