落空: come to nothing; fail; fall through 短语和例子两头落空 fall between two stools; 希望落空 fail to attain one's hope; 打算落了空。 the plan fell through. 这事有落空的危险 。there is a danger that nothing will come of i
两头落空: fall (to the ground) between two stools; between two stools one falls to the ground.; if you run after two hares, you will catch neither.; if you run after two horses, you will catch none.
