back to the wall
陷入困境、危机或逆境, 背水一战
书面/口语·表示陷入绝境背水一战
英文释义
to be in a difficult or desperate situation with no easy way out
例句
With his back to the wall, he had to take the risky deal or go bankrupt.
典故来源
源自战场或格斗场景，当士兵背靠墙壁时，已无退路，只能拼死一搏，比喻绝境中的最后挣扎。