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

"The ambiguity that's in those answers is very,very difficult for humans to understand, never mind a computer to understand.

VOA: special.2011.02.28

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

She found it difficult for women to balance all these duties and still make a place for themselves.

VOA: special.2009.06.28

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

She was a successful teacher, but the work,she decided, was too difficult for the amount she was paid.

VOA: special.2010.04.25

"Do you remember how Germont laughed when I said the mystery was difficult for him to solve because it was so simple?"

VOA: special.2009.12.26

He also says the economic situation will make it more difficult for some victims to leave abusive relationships.

VOA: special.2009.02.28

So they quickly passed a bill that made it much more difficult for Chinese citizens to come to live in the United States.

VOA: special.2010.03.11

But it also made it difficult for them to earn enough money to improve their condition.

VOA: special.2010.02.04

This has made it even more difficult for many people to rebuild their lives and communities.

VOA: special.2010.01.22

That requirement could make it difficult for several states to receive money from the fund.

VOA: special.2009.07.30

And the rate of change means it's very difficult for the classical educational programs to keep up with the demand that's out there in the marketplace."

VOA: special.2011.01.24

Officials would order all lights in a city turned off to make it difficult for enemy planes to find a target in the dark of night.

VOA: special.2009.11.15