a burnt child dreads the fire
一朝被蛇咬，十年怕草绳
书面/口语·表达一朝被蛇咬
英文释义
someone who has been hurt or had a bad experience is extra cautious to avoid similar situations in the future
例句
He won't invest again; a burnt child dreads the fire.
典故来源
源自古老谚语，指受过伤害的人会格外警惕类似危险。