The study of geometry and physics was especially difficult.

VOA: special.2009.11.15

Bono has said that the hopeful message of this song is especially meaningful during these difficult times.

VOA: special.2009.04.10

And identifying the cause of the pain can be difficult, especially for untrained doctors.

VOA: special.2011.07.26

But making the vaccine more widely available especially in rural areas has been difficult.

VOA: special.2009.11.03

The F.A.O.says fish piracy is difficult especially for developing countries to fight.

VOA: special.2009.02.10

"Big ears, big old jug ears like that." Pett says,cartoonists are essential to showing the lighter side of life, especially in difficult times.

VOA: standard.2010.03.20

And,these are occurring at a time when the global economic crisis is making it more difficult to maintain good health, especially in the developing world.

VOA: standard.2009.05.18