Sentence examples for often unknown from inspiring English sources

Enemies are often unknown.

The cause of vertigo is often unknown.

The causes of death are often unknown.

In practice, the test object capacitance is often unknown.

Often unknown factors may complicate the interpretation of the data.

Solutions to these challenges are often unknown, and contextually dependent.

The location of buried utility pipes is often unknown.

Independency of other, also often unknown, substance properties was a major claim to this work.

However, these parameters are often unknown and not easy to determine.

However, the applicability of such data for urban runoff assessments is often unknown.

The messages often come from faked e-mail accounts; the intended recipients are often unknown.