a)BACK/BACKWARDSto move backwards, away from someone or something 退后,后退
She backed off and then turned and ran.
她一步一步往后退去,然后转身跑了。
b)FORCE somebody TO DO somethingto stoptelling someone what to do, or stop criticizing them, especially so that they can deal with something themselves 放过,不去管〔某人〕
I think you should back off for a while.
我想你应该放手一阵子。
Back off, Marc! Let me run my own life!
走开点,马克!我的生活我自己来安排!
c)STOP DOING somethingto stop supporting something, or decide not to do something you were planning to do 退出,放弃
Jerry backed off when he realized how much work was involved.
杰里知道有多大的工作量之后,就放弃了。
from
The company has backed off from investing new money.