The return of the sun and the moon means that they set each other off for a long time.

The return of the sun and the moon means that the sun and the moon rise and fall alternately, reflecting each other and lasting forever.

The combination of the sun and the moon is interesting in itself. Among them, the sun and the moon represent the sun and the moon respectively, which are the two most representative celestial bodies in nature.

Duality can be understood as two, and it can also be understood as repetition and overlap, which expresses the overlapping scene of the sun and the moon. And regression means regression and appearance. The return of the sun and the moon can be understood as the simultaneous appearance of the sun and the moon, or both.

Long contrast means that the sun and the moon reflect each other and emit beautiful and lasting light. Here, set each other off to become interesting means to reflect each other and set each other off to become interesting, while long time is to describe the long and eternal time. The whole poem expresses the beautiful scene that the sun and the moon depend on each other and set each other off into interest, and it also refers to beautiful, lasting and eternal feelings or things.

The artistic conception of this poem is very beautiful, which makes people feel the magnificence and mystery of nature and the beauty and brevity of life. It tells us that natural landscapes like the sun and the moon, though short-lived, are beautiful and can be a symbol of our pursuit of a better life.

It also inspires us to cherish the people and things in front of us, to feel the beauty and meaning of life with our hearts, and to make our life as bright as the sun and the moon.

The scene described in the sentence "The sun and the moon return and set each other off for a long time":

1, the sun and the moon alternate: this sentence refers to the return of the sun and the moon, which means that the sun and the moon appear in the sky at the same time. This astronomical phenomenon is often used to express the cycle of time and the change of the sky. Here, the simultaneous appearance of the sun and the moon symbolizes the eternity and infinity of time.

2. Contrast between light and shade: the sun and the moon appear alternately in the sky, one bright and one dark, one yang and one yin, which set each other off and become interesting, forming a sharp contrast. This contrast symbolizes the confrontation between light and darkness, and implies the strength and eternity of life.

3. Set each other off: When the sun and the moon appear in the sky at the same time, they set each other off and make the sky more beautiful. This contrasting scene implies the interdependence and mutual support between husband and wife and friends, and expresses the eternal theme of love. This sentence symbolizes the eternity of time, the tenacity of life and the eternity of love by depicting the alternation and contrast between the sun and the moon.