这是一个大错
This is a big mistake
以上为机器翻译结果，长、整句建议使用 人工翻译 。
我有时想这是一个大错。
I sometimes think that it is a great mistake.
youdao
我想这是一个大错误。
I think this was a BIG mistake.
这是一个大错误，我永远不会忘记的一个教训。
That was a mistake, and it was a lesson I would never forget.
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