用unexpected failure造句子，“unexpected failure”造句

Courage for some sudden act, maybe in the heat of battle, we all respect, but there is that still rarer courage which can sustain repeated disappointment, unexpected failure, and shattering defeat.

For example, you can imagine that having a sudden and unexpected failure in your HVAC can run you several thousand dollars.

The unexpected failure made the students like the leaves and leaves of the frost, and then they languish in a sluggish manner.