They were not charged with the more serious crime of espionage, so the extent of their success as spies is not clear.

VOA: special.2010.07.10

He says the methane discovery presents scientists with a mystery because it is still not clear how the gas is being produced.

VOA: special.2009.12.30

So it was not clear at first who had won the presidential election.

VOA: special.2010.03.11

He was a very able man, but his loyalties were not clear.

VOA: special.2009.04.16

But how the results will be presented is not clear.

VOA: special.2009.04.17

But how many countries will join Britain is not clear.

VOA: special.2010.06.25

It says the earliest beginnings are not clear.

VOA: special.2010.04.30

Where the expression came from is not clear.

VOA: special.2009.01.25

Exactly how is not clear yet.

VOA: special.2009.02.13

It is not clear if the incident is in any way related to the government losing control of Beledweyne.

VOA: standard.2009.08.21

This much scientists knew. However,they were not clear on how that receptor was activated when this kind of painful event occurred.

VOA: standard.2010.05.04

Intel has operated on the Sabbath in Jerusalem for years, so it is not clear why the protests broke out now.

VOA: standard.2009.11.14

Iran signed a similar deal with Pakistan, last month, although it is not clear if it will be implemented.

VOA: standard.2010.07.23

Fahmy Howeidy, a prominent Egyptian columnist, says it is not clear how long or how inclusive the new border opening will be.

VOA: standard.2010.06.01