off balance 1. (身体)失去平衡，不平衡，摇摇欲坠，有倾覆(或跌落)危险 2. 慌慌张张；毫无准备；没法 out of balance= off balance
off balance 1． not in balance失去平衡 Paul was speeding along on his bicycle，when an unexpected hole in the road caught him off balance．保尔飞快骑着自行车，没料到路上的一个坑使他失去平衡，从车上摔下来。
2．not prepared； not ready无准备地；不防备地 Our surprise attack caught the enemy off balance and threw them into confusion．我们的突然袭击把敌人打了个措手不及，他们顿时乱作一团。
The teacher's surprise test caught the class off balance，and nearly everyone got a poor mark．老师突然抽考，使全班毫无防备，几乎每个同学成绩都很差。
out of balance 就是“失去平衡”的意思，一般就是sb/sth be out of balance。
答：从装系统或者恢复设置详情>>
