Can i submit the same articles in article directories?

the answer is yes, as long as it's different directories.

 

thanks to all of you for your valuable suggestions

 

You can, but if you want better results you can simply change the title, and some of the first and last paragraphs in the article. That should help with avoiding duplicate content.

 

While I can see that changing 33% of the article either by software or by hand is not that difficult I wonder how it works long term. While google may pass on the back links I wonder what it can do to hurt your "authority" on the subject and if it isn't safer , thus better to simply spend a little extra time to write one good article and move on to the next. As you all know writing 400 hundred words is really easy especially for those of you, likely all of you that know your areas of interest so well it practically spills out on to the page. I think credibility is kind of important, yes I may be naive, but none the less punching out 100 articles that are all 33% differant, but 67% similar seems risky.