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.
(..) -Whew! Hallelujah! -Yeah! All right! -Hey, watch it! Sorry there, old spud head. Mission accomplished. Well done, men. Pack it up. We're goin' home. So did I tell ya? Nothin' to worry about. I knew you were right all along, Woody. Never doubted ya for a second. (..)1995 Toy Story