To repeatedly ponder, analyze, or savor something within a single day; to turn something over in one's mind many times throughout the day.
他对这幅画的构图和色彩深深着迷，常常一日三覆，每次都能发现新的细节。
He was deeply fascinated by the composition and colors of this painting, often pondering it repeatedly throughout the day, discovering new details each time.
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