乘客必须完全清理宠物所遗留之污秽物.Passengers should bear the responsibility to clean up all the sewage left by their pets.当某人偷东西时,会有一块不明的污秽物投向他.An unspecified bit of nastiness which can be cast on someone who steals something....

“污秽物”的英语可以翻译为：dunghill ...