Read the following sentences and synthesize the text. What explanation does the author use to introduce Sun's experience?

In the article "The Sun", the author mainly uses examples, comparisons, figures and metaphors to show that the sun has the characteristics of long distance, large volume and high temperature.

1、

"The sun is1.500 million kilometers away from us." This sentence uses the explanation method of column number. Numbers are the most accurate, scientific and convincing basis for quantitatively explaining the characteristics or reasons of things. Make the explanation more convincing and convincing.

2. The sentence "1300,000 Earths is equivalent to one sun." uses the methods of comparison and enumeration. When explaining some abstract or unfamiliar things, we can compare them with concrete or familiar things, so that readers can get a concrete and vivid impression in comparison, and the characteristics of things often appear in comparison.

3. "The sun will shine and heat up, which is a big fireball." This sentence is explained by analogy. Through analogy, we can make abstract things concrete, vivid and vivid, or explain the characteristics of things accurately, concretely and easily.

4. "Going to the sun, if you walk and walk, you will walk day and night, which will take almost 3,500 years; Even if you fly, you have to fly for more than 20 years. " This sentence is illustrated by examples and figures. In the expository article, actual examples are cited to explain things, which makes the things to be explained concrete, makes the meaning of the article more clear, makes readers understand it more clearly and enhances persuasiveness.