ㄗㄨㄛˋzuòㄋㄧㄡˊniúㄗㄨㄛˋzuòㄇㄚˇ

  1. 比喻工作勤奮勞苦張先養家活口每日早出晚歸做牛做馬不休。」

lit. to work like an ox, to work like a horse; fig. to work extremely hard