求翻译：在2011年的九月份，我参加了数个企业的面试，通过面试，了解到自己缺乏的知识和能力，特别是涉及专业问题的时候，更让我觉得应该加强自身的专业知识学习。是什么意思？

In September 2011, I attended a number of business interviews, through the interview, understand their lack of knowledge and ability, especially when related to professional issues, made me think we should strengthen their professional knowledge.

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In 2011 in September, I participated in several enterprise's interviewing, through interviews, understood own deficient knowledge and ability, specially involve the specialized question time, lets me think should strengthen own specialized knowledge study.

In September of 2011, the interview I participated in a number of enterprises, through an interview, knowing that their lack of knowledge and capacity, especially when dealing with professional, but I think they should increase their professional knowledge.

In September 2011, I attended a number of business interviews, through the interview, understand their lack of knowledge and ability, especially when related to professional issues, made me think we should strengthen their professional knowledge.