The nature of these possible sexual relations remains, however, disputed and lost to history.

His good humor and happy nature will remain with us.

He's still striving for the top, while his arrogant and ruthless nature remains.

"But it will succeed only if nature remains in a relatively pristine state."

Its true nature remains to be confirmed as this will require more than just field observation.

In the northern part of Inagawa, much nature remains.

The extent and nature of his role remains to be seen.

Whether or not humans could do better than nature in engineering novel proteins remains to be seen, he said.

The nature and details of that internal debate have remained secret.

Ever since, its true nature has remained a riddle astronomers have been unable to solve.