overstatement

1. N-VAR If you refer to the way something is described is an overstatement, you mean it is described in a way that makes it seem more important or serious than it really is. 夸大其辭

This may have been an improvement, but "breakthrough" was an overstatement. 也許已經(jīng)有了改善，但“突破”是夸大其辭。