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“苦思冥想”，汉语成语，比喻绞尽脑汁，深沉地思索。可以翻译为“rack one’s brains（to evolve an idea），think hard and long或ponder over something all day long”等。
例句：
他苦思冥想，还是不得其解。He failed to find an answer after pondering long and hard over the question.
Editor: Jade