反水不收

Explanation: Water has been poured out, can not be recovered. Analogy irreversible. 　　Usage: The main predicate; as object, complement; metaphor irreversible 　　Source: Fan Ye Southern Song "on the Later Han Ji Guangwu": "Although the phase Zhong Ni, grandson to be, I still fear for the benefit of incompetence. Defection do not accept, and without regret." Thesaurus:  one Not return to, what's done cannot be undone, The die is cast., fait accompli (noun), Ma ago splash, adage, come to stay