The unexpected disaster destroyed the whole city.
这场意料不到的灾难摧毁了整座城市。

N-COUNT. 副产品;派生产品. A spin-off is an unexpected but useful or valuable result of an activity that was designed to achieve something else.

French Catholicism is a battered tree, but it can still sprout new and unexpected branches.

法国天主教是棵受损的大树，它还是可以发芽，长出意料之外的新枝。

There will be unexpected gains.

将有未预料到的收获。