To undergo numerous severe trials and tribulations; to repeatedly face peril and overcome it, often implying a long and arduous journey towards an ultimate goal or transformation.
他为了实现心中的梦想，经历了七死七生般的磨砺，最终才得以成功。
To achieve the dream in his heart, he went through arduous trials akin to seven deaths and seven lives, before finally succeeding.
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