我后来认识到他犯了一个简单但可原谅的历史错误。

I then realized that he had made a simple but excusable historical mistake.

《柯林斯英汉双解大词典》

如果有时候我犯了这样的错误，你一定得原谅我。

You must forgive me if I sometimes make these mistakes.

youdao

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.

youdao