承诺都苍白的可笑约定都黯然的可悲
[chéng nuò dōu cāng bái de kĕ xiào yuē dìng dōu àn rán de kĕ bēi]
Expresses disillusionment with broken promises and unfulfilled commitments. 'Promises are laughably hollow, vows disappointingly sad'. It conveys the pain or irony of shattered hopes.