" Fortuitous" - this means unplanned or coincidental.

“偶然发生的”—含义是意外或巧合。

Researchers estimate that half of consumer spending is unplanned.

据研究人员的估算 有一半的消费者支出是计划外的。

It was a big, unplanned BBC Learning English meet up!

这真是一场没有提前计划的BBC《地道英语》的大聚会！

Unplanned breaks are antithetical to the pervasive anxiety to perform.

计划外的休息对保持良好表现的焦虑很不利。

533 days of unplanned space travel where anything could go wrong.

533 天超出计划外的宇宙航行，哪里都可能会出差错。

He likes things unplanned and likes to see where the road takes him.

他喜欢没有计划的做事情，喜欢顺其自然。

Everything Jake and I have done has been pretty unplanned and organically unfolds.

杰克和我所做的每一件事都是完全没有计划的，而且是有机地展开的。

But this is likely the first unplanned strike to be identified in this way.

但这可能是第一次计划外的以这种方式被发现的撞击。

Three years later, the percentage of births from unplanned pregnancies dropped 23 percent.

三年后，计划外怀孕的比例减少了 23%。

The document sets rules for naval ships and aircraft to follow during unplanned contacts at sea.

该文件规定了海军舰船和飞机在海上意外相遇时应该遵守的规则。