但我犯了个错误，就是在调查中仅仅关注了英文资料。
But I was making a mistake by focusing my research on English resources alone.
尽管很难兼顾，但我喜欢这样，我觉得我干得不错，除了犯了一个不可原谅的错误。
It was hard, but I enjoyed it and believed I did it pretty well except for one inexcusable mistake.
肯塔基的一个13岁女孩写信给我说，虽然我犯了一个错误，但我不能辞职，因为我的敌人是卑鄙的。
A thirteen-year-old girl from Kentucky wrote me to say that I'd made a mistake, but I couldn't quit, because my opponents were mean.
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