The fate of the three men is unknown.

这三个人命运未卜。

《牛津词典》

Ever since the earliest days of AI, there have been concerns that some day software will take over the world, leaving the fate of humans unknown.

自从人工智能出现以来，人们就一直担心有一天软件会占领世界，而人类的命运却无人知晓。

youdao

His fate was entering the unknown.

他的命运进入了未知的境地。

youdao

Sedova said that four people have been confirmed dead, two were injured and the fate of two others remains unknown.

NPR: Ukraine: 4 Dead, 2 Injured In Crash-Landing

The fate of "Bunheads" is still unknown, but it can count Graham among its devoted fan base.

CNN: 'Gilmore Girls' reunion? Someday, someday, maybe

The fate of the former Iraqi leader remains unknown.

CNN: Pentagon: 'Major combat' over, but smaller fights remain