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It is ignorant to make a mistake; but it is stupid to repeat a mistake.
犯错是由于无知，但是重复犯错就是愚蠢了。
youdao
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I will try my utmost not to make such a stupid mistake again.
我将竭尽全力避免类似这种愚蠢的错误再一次发生。
youdao
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He promises never to make such a stupid mistake again.
他许诺再也不犯这样愚蠢的错误了。
youdao