千锤百炼

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❶ 比喻经过无数艰苦的锻炼和考验，例经过社会的千锤百炼之后，他显得成熟稳重多了。

He has become more mature and steady since he has been through the thick and thin of life，so to speak

❷ 比喻文章、作品经过多次的修改，例这篇社论是经过多方面的千锤百炼之后才发表的。

Before publication，this editorial went through several hands，and was revised and rewritten