"There has been a long and vigorous debate about this. And that is how it should be.

VOA: standard.2009.08.11

But Sinclair-Thompson adds it is unclear how long it may take the airline industry to recover.

VOA: standard.2009.04.28

While Iraq still has a long way to go before it reaches stability, there is a certain sense of satisfaction in how the elections were conducted.

VOA: standard.2010.03.08

Dollet adds that while there are other Arabic-speaking countries that do not control the Internet as much as Egypt, it is not clear how long that relative freedom will last.

VOA: standard.2009.11.16

"Because there are only a couple of previous records of eruption at this particular volcano, it is difficult to judge either how long the activity will go on there, or how long the volcano might then be dormant before it goes active again."

VOA: standard.2010.04.15

"People ask me,' How long did it take you to write that book? ' The answer is,'Sixty-eight years.'" The book consists of 600 essays by Milner - some done in consultation with other experts in the many fields shaped by Darwin's thinking ." .

VOA: standard.2009.11.25