As soon as the half-acre square pond opens, it opens like a mirror. Compare this book to a pond half an acre square. The book is rectangular, so it is called "half-acre square pool".
"Once opened", compared with a mirror, the square pond is unusually clear. )
The sky and the clouds are hovering (the sky and the clouds are hovering: the sky and the clouds are reflected in the pond together and keep shaking. Write the beautiful scenery reflected by the crystal clear square pond.
"skylight" and "cloud shadow" are metaphors of the contents of the book. )
Ask the canal to be so clear, because there is running water at the source. Q: Why is the water in that square pond so clear? Because there is a steady stream of living water. )
This is a famous poem that takes scenery as a metaphor. Compared with the square pond, the whole poem vividly expresses a subtle and unspeakable reading feeling. The pond is not a pool of stagnant water, but often full of living water, so it is as clear as a mirror, reflecting the sky and clouds.
This situation is quite similar when the same person gets through the problem, gains new knowledge and gains a lot of benefits in reading, and raises awareness. The aura, clear thinking, fresh and lively spirit and self-satisfaction of this poem are the author's personal reading feelings as a university scholar. Although this feeling expressed in the poem is only for reading, it has profound implications and rich connotations, which can be widely understood.
For reference.