They have 'accomplished' [='done, achieved'] much in a very short period of time.
He finally felt like he had 'accomplished' [='done'] something important.
He is one of the school's most 'accomplished' graduates.
(..) In my hand, Doc! I got it in my hand! Burn it! Check! Doc! Doc! The newspaper changed. Doc, my father's alive! Mission accomplished. That means Jennifer's okay and Einie's okay, right? That's right, Marty. It's the ripple effect. The future is back, so let's go home. (..)1989 Back to the Future Part II