Translation of perra

Robert wants to tell us not only about nature and its secrets but also about the ability of the human being to recognize what happens around us. We see only the nice side if we just read and do not analyze.
My experience at Vocabulix has been great. I really think that this site has helped me a lot in improving my Spanish language skills. I believe that I could learn here several other languages.
Sorry for bothering you with so many questions. You are going to be my first online language course. The more I trust you and your website, the more I will use it and recommend it...No problem...