Half an acre of square pond was opened, and the sky was full of clouds. How clear is the canal? Because there is inexhaustible living water for it.

Poetry is a philosophical poem expressing reading experience. When describing the perceptual image of things themselves, it also contains rational things. Half an acre of square pond is not big, but it is as clear as a mirror. "A mirror" means "mirror". Looking into a person's mirror, "mirror" and "mirror" have the same meaning.

The "half acre square pond" opened like a mirror.

Although the "half acre square pond" is small, it is as clear as a mirror, and "the sky and clouds" are reflected by it.