He had decided, and it was irrevocable.
他决心已定, 驷马难追.
So then it was too late to retract.
但一言既出,驷马难追.
Even four horses cannot take back what one has said.
一言既出,驷马难追.
As the saying goes, a word spoken can never be taken back.
古语说, 一言既出,驷马难追.
简答网 · 高考英语
简答网 · 四六级英语