To look at them is to see the simple solution to a problem that worried people for many centuries.

VOA: special.2010.07.14

This is a common problem for millions of children around the world and not just at school, but also at home.

VOA: special.2009.12.21

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

Charles Wortmann at the University of Nebraska-Lincoln says a one-time tillage may be used to correct a problem like aggressive weeds.

VOA: special.2010.09.28

Researchers led by George Malone at the University of Delaware began dealing with the problem in two thousand.

VOA: special.2009.09.08

The lack of snow will not be a problem for events being held at the ski area in the city of Whistler.

VOA: special.2010.02.10

Adding to the problem, poachers today are more skilled at killing rhinos, and not only with guns.

VOA: special.2009.12.14

But Steven Biddle at the Council on Foreign Relations in Washington says there is a bigger problem.

VOA: special.2009.08.22

Rod Curtis at the World Health Organization in Geneva says the new bivalent vaccine solves this problem.

VOA: special.2010.01.18

The populists solved the problem at their nominating convention.

VOA: special.2010.07.01

Cut at the place where the problem begins.

VOA: special.2009.10.06

Big mosquitoes were a problem at the camp.

VOA: special.2009.01.24

Premier Wen addressed the problem at the conference, saying Africa is capable of solving its own problems, using African ways.

VOA: standard.2009.11.08

Clarence Ditlow at the Center for Auto Safety in Washington says the problem may be caused by faulty electronics.

VOA: standard.2010.03.04