If all else fails, we can always stay in and watch TV. 如果其他的都行不通,我们总是可以呆在家里看电视。
If all else fails, you will have to take legal action.
He has a backup battery and a generator for his respirator, but always stays within reach of friends who can get him to a hospital if all else fails.
We're doing everything we can to protect our home from the storm, but if all else fails, we can go to a nearby hotel.
If all else fails, we can't rule out military action.
See also: fail verb (NOT SUCCEED)