求翻译：这是前段时间给一些外行人讲课的PPT,今天照办来给大家讲就有点班门弄斧的感觉，甚至诚惶诚恐；但还是壮着胆子来了，大家互相学习吧，不对的地方请各位指出！是什么意思？

Ppt lecture some time ago to some layman to do so to tell you the feeling of a little trespass, even fear and trepidation; but still bold enough to learn from each other the wrong place please point out!

This is the time to teach a number of laymen PPT do today, to give you a little bit on betraying, and even feel the fear and trepidation; however, eyelids, and we all learn from each other, not the local members pointed out that!

This a while ago gives PPT which some laymen taught, today acts accordingly says for everybody on the feeling which a little showed off meager skills before an expert, even in reverential awe; But the strong courage has been coming, everybody studies mutually, not the right place asks each position

This was some time ago to the layman and lecture PPT, do so to tell you today is sort of feel to suck eggs, even in great trepidation; but dare come, we learn from each other, wrong place, members pointed out that!

正在翻译，请等待...