At the first glance you will think that wheels on one side have no purpose, but then we figured out that they do have very practical role. (thankyourbaby.com)
But the dreams of video game players suggest they have a more practical role: helping us to learn new skills. (newscientist.com)
Parallel institutions also play an important practical role in the bitcoin community which is highly fluid and transplantable. (simplybitcoins.com)