Three expensive and fall, the black dog struggles, the wind and flowers are vertical and horizontal, and the bow string is broken. Who can explain what it means?

There is no clear source and explanation for this sentence, which looks antique and may be an image description in some literary creations.

"Three expensive and falling" may mean that something or a situation will have a downward trend after reaching three peaks.

"Black dog in distress" may refer to a very difficult or dangerous situation, or it may be related to something mysterious and ominous.

"Wind and flowers crisscross" may refer to the interaction between wind and flowers, or a free, intense and changeable state.

"Self-breaking bowstring" may refer to a symbol of decision or change, it may refer to giving up old bonds or relationships, or it may refer to the release of some kind of power.

Generally speaking, this sentence may describe the turning point and change of a thing or situation, as well as possible difficulties and challenges. However, due to the lack of clear context and source, it is impossible to give a more accurate explanation.