Complex sentence: She is the 2012 Rostelecom Cup bronze medalist, a two-time World Junior medalist (2010 silver, 2011 bronze), a two-time U.S. national bronze medalist (2012,2013), and the 2010 U.S. Junior champion.
Split into simpler sentences: She is the 2012 Rostelecom Cup bronze medalist and a two-time U.S. national bronze medalist (2012,2013). As a junior, she was a two-time World Junior medalist (2010 silver, 2011 bronze) and the 2010 U.S. Junior champion.