She wanted to learn this difficult skill because she liked the mathematics involved.

VOA: special.2009.12.23

He published several books during this difficult period of his life.

VOA: special.2009.06.14

We asked Eric how he studied for this difficult competition.

VOA: special.2009.05.29

The actor Laurence Olivier shines in this difficult role.

VOA: special.2010.01.06

A spokesman for Gordon Brown says the prime minister's thoughts are with the singer's family at this difficult time.

VOA: standard.2009.06.26

Grybauskaite adds that "in this difficult times she wants to give her experience" as European Commissioner to her Baltic nation.

VOA: standard.2009.05.17

But for people who have a difficult time controlling their movements, this little navigational issue can be a really big problem.

VOA: special.2011.04.18

Police say one thing that makes discussion of this law difficult is that many critics have not read the law.

VOA: special.2010.07.03

This makes it more difficult for students to buy papers from companies that some call "plagiarism mills" or "essay mills."

VOA: special.2009.04.23

This makes it more and more difficult for them to make friends and more likely that society will reject them.

VOA: special.2010.01.06

Industry leaders, meeting this week in Malaysia, were told that their industry faces its most difficult situation ever.

VOA: special.2009.06.13

This makes it more difficult for the body to effectively use the same amount of oxygen as it would on the ground.

VOA: special.2009.07.14

However,this is more difficult because it is harder to control the diets of people and because they live longer than other animals.

VOA: special.2009.09.01

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

VOA: special.2009.04.10