你可以用 "unforgettable mistake" 来表示 "难忘的犯错经历"。
"Unforgettable" 是形容词，意思是 "值得记忆的" 或 "难以忘怀的"。"Mistake" 是名词，意思是 "错误" 或 "失误"。
例句：
"I made an unforgettable mistake during my presentation at work. I was so embarrassed that I couldn't look anyone in the eye for the rest of the day." (我在工作演讲中犯了一个难忘的错误。我非常尴尬，以至于整天都不敢正视任何人。)
"One of my most unforgettable mistakes was forgetting to turn off the stove before leaving for vacation. We came back to a burnt kitchen and had to stay in a hotel for a week." (我最难忘的犯错经历之一是在出去度假前忘记关掉炉子。我们回来后发现厨房被烧毁了，不得不在酒店住上一个星期。)
"Unforgettable" 是形容词，意思是 "值得记忆的" 或 "难以忘怀的"。"Mistake" 是名词，意思是 "错误" 或 "失误"。
例句：
"I made an unforgettable mistake during my presentation at work. I was so embarrassed that I couldn't look anyone in the eye for the rest of the day." (我在工作演讲中犯了一个难忘的错误。我非常尴尬，以至于整天都不敢正视任何人。)
"One of my most unforgettable mistakes was forgetting to turn off the stove before leaving for vacation. We came back to a burnt kitchen and had to stay in a hotel for a week." (我最难忘的犯错经历之一是在出去度假前忘记关掉炉子。我们回来后发现厨房被烧毁了，不得不在酒店住上一个星期。)