The butter not only adds richness to the burger and prevents it from drying out, but it also butters the bun for you. We're not going to downplay it, these burgers are decadent. But, if you're going to eat a burger, you may as well do it right. And, this recipe does it so right.
The word persistence means the quality of being determined to do or achieve something. It's tenacity. It means firmness of purpose. It is a continuing, repeating or lasting of something. Use the link and read a few similar definitions.
In online education, persistence has evolved as a more complex set of factors that is unrelated to knowledge and results in student success (Park & Choi, 2009). In this review, persistence will be treated as a multi-faceted phenomenon that leads to completion of an on-line program of study.