【驷马难追】〖sì m nán zhu〗[what has been cannot be withdrawn]

驷不及舌党宣言，

马空冀北聚英贤。

难能可贵拯人类，

追电逐风大同寰。

一句话说出了口，就是套上四匹马拉的车也难追上。指话说出口，就不能再收回，一定要算数。A word say out mouth, is  four horse car is also difficult catch up. Referring word say out mouth, can not be recovered, must cash or perform.同：驷不及舌。反：蜗行牛步。谜：四。