There are many places on the earth that are still unknown to humans.

地球上还有许多人类未知的地方。

youdao

It is still unknown how the universe came into existence.

人们仍然不知道宇宙是如何形成的。

youdao

The cause of her death is still unknown.

关于其死亡的原因至今还未知晓。

youdao

And the strong man, still holding the small child, drifted away on the shadowy river that flows forever to the unknown sea.

VOA: special.2009.06.06

books that are out of print and still under copyright, but the current holder of that copyright is unknown.

VOA: standard.2009.12.31

Diakite,who is also known as Toumba, escaped the attack and is still at large with an unknown number of soldiers from the presidential guard.

VOA: standard.2009.12.07

Still unknown: what types of chemicals and in what quantities were stored at the facility.

CNN: SHARE THIS

Successful professionals have to be willing to embrace change, even when the outcome is still unknown.

FORBES: Learning To Love Change In The Workplace

The key for the file has yet to be released, and its contents are still unknown.

FORBES: Following WikiLeaks' Playbook, BalkanLeaks Releases Insurance File With Its Spilled Secrets