谁的青春不范二谁的青春不迷茫
[shéi de qīng chūn bù fàn èr shéi de qīng chūn bù mí máng]
This means 'Whose youth does not act goofy, whose youth isn't bewildered'. This acknowledges the general trend for youth to include both silly mistakes and moments of profound confusion, which are all part of growing up.