A flood of ideas or thoughts coming and going in one's mind, often rapidly and intensely.
面对即将到来的新挑战，他心里思潮起伏，既兴奋又有些担忧。
Facing the upcoming new challenge, his mind was a tumult of thoughts, both excited and a little worried.
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A flood of ideas or thoughts coming and going in one's mind, often rapidly and intensely.