To talk or write in a vague, irrelevant, or impractical manner; to wander off the subject; to be beside the point.
他的建议总是天马行空，不着边际，难以付诸实施
His suggestions are always wild and off-topic, making them difficult to implement.
Era:
Ancient
Frequency:
Story:
Once upon a time, there was a man who had been blind since birth and had never seen the sun. He asked others what the sun looked like.
People told him the sun was shaped like a round disk, and its light was similar to candlelight. However, he then mistook objects like a clock or a flute for the sun, which led to many jokes and misunderstandings.
Ultimately, he still could not truly understand what the sun was like, as his attempts to grasp it were always far from the actual concept.
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