on a wing and a prayer
毫无根据地承担重大任务或挑战，几乎没有希望成功或幸运支持
口语·表达侥幸成功或冒险尝试
英文释义
trying to achieve something with very little chance or hope of success
例句
The team finished the project on a wing and a prayer, just barely meeting the deadline.
典故来源
源自二战时期飞行员在飞机受损后仅靠机翼和祈祷勉强飞行，比喻在极低概率下冒险尝试。