投:用东西去掷;忌:怕,有所顾虑。想用东西打老鼠,又怕打坏了近旁的器物。比喻做事有顾忌,不敢放手干。[throw something at a rat,but afraid to break the vase;caution in taking action;burn not your house to rid it of the mouse;spare the rat to save the dishes;those who live in grass house should not throw st