equally difficult to go on or retreat; be kept in the air ❍ 敌军士兵～，旋即为我军全部歼灭。The enemy soldiers were put between two fires and were soon completely annihilated by our army.
进退失据jìn tuì shī jù
前进和后退都无所依靠，进退两难。be kept in the air, be in a dilemma, in a box, in a fix