An extremely low body temperature can cause the heart to beat so slowly that a pulse may be difficult to find.

VOA: special.2009.12.30

Today,the solution to the problem is so common that it is difficult to understand that there was a problem at all.

VOA: special.2010.07.14

He said later that he did so because he was finding it difficult to bring up the question of surrender.

VOA: special.2009.12.24

So,just being able to pick one of those up will help our visitors understand how difficult portability was about thirty years ago."

VOA: special.2011.02.15

"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

For example, celiac disease is difficult to identify because the signs of the disease are so common.

VOA: special.2009.04.14

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

For example,celiac disease is difficult to identify because the signs of the disease are so common.

VOA: special.2010.06.15

So it might be difficult to imagine anything twice as big.

VOA: special.2009.09.22

So it is difficult to see the animals in the sand.

VOA: special.2010.01.04

And none will be so difficult or expensive to accomplish."

VOA: special.2009.07.08

It would be difficult, even painful,to do so.

VOA: special.2009.12.06

"What is required of us now is a new era of responsibility Ca recognition on the part of every American, that we have duties to ourselves, our nation and the world, duties that we do not grudgingly accept but rather seize gladly, firm in the knowledge that there is nothing so satisfying to the spirit, so defining of our character, than giving our all to a difficult task."

VOA: special.2009.01.24

"And since it is so much more expensive and so much more difficult to cure, that would be a catastrophe."

VOA: standard.2009.12.09