ㄙㄧˋ ㄇㄚˇ ㄅㄨˋ ㄓㄨㄟ 驷马不追(駟馬不追) 见“ 駟马难追 ”。
What has been cannot be withdrawn
驷(sì)
马(mǎ)
不(bù fǒu)
追(zhuī duī)