For example, one who doesn't know the rules a about plagiarism (剽窃) may accidentally use words or ideas without giving proper credit or one who fails to keep careful research notes may unintentionally fail to quote and cite sources as required.
出自-2011年12月阅读原文
英语六级真题
On their way to creating a feminist paradise, the Swedes have unintentionally created a haven (避风港) for normal mortals.
出自-2014年6月阅读原文
柯林斯高阶英汉双解学习词典释义
ADJ
非故意的；无心的
Something that is unintentional is not done deliberately, but happens by accident.