Jīng / guò / duō / nián / de / xué / xí / tā / yǐ / jīng / bú / shì / dāng / nián / de / Wú / xià / ā / Méng / le经过多年的学习,他已经不是当年的吴下阿蒙了。After years of study, he is no longer the unlearned person he once was.