A small ball with a diameter of 1 nanometer placed on a table tennis ball is equivalent to the moon placed on the earth.

A small ball with a diameter of 1 nanometer placed on a table tennis ball is equivalent to the earth placed on the sun.

A small ball with a diameter of 1 nanometer placed on a table tennis ball is equivalent to placing bacteria on an apple.

Use a comparative explanation method.

Comparison usually involves comparing two things through narrative or explanation, identifying in the comparison, and showing the characteristics of the object being explained; while making an analogy uses description to describe the characteristics of the object being explained. The characteristics are vividly displayed, giving people a vivid feeling, so as to understand the characteristics of the object being explained.

Extended information

Other characteristics of explanation methods:

1. Give examples:

Give actual examples to explain things and make what you want The thing explained is made concrete so that readers can understand it. This method of explanation is called giving examples. When using examples to explain things or events, one must pay attention to the representativeness of the examples, and the other is to pay attention to the appropriateness of the examples.

2. Quotes:

In order to make the explanation more concrete and convincing, you can quote some literature, poems, sayings, famous sayings, etc. The scope of quotations is very wide, which can be classic works, famous quotes, formulas and laws, allusions and proverbs, etc.