Definition: when something does not work, or stops working as well as it should Level: B2
所有火车都因停电而延误了。
All trains were delayed due to a power ___failure.
他死于心力衰竭。
He died of heart ___failure.
停电了，但会在几分钟内解决。
There has been a power ___failure but it will be solved in a few minutes.
