For example, lightning can create tubes of glass when it strikes sand that has the right combination of minerals.

VOA: special.2009.09.16

But the experts say you should still use traditional CPR with a combination of breaths and compressions on babies and children.

VOA: special.2009.06.09

Recent studies also support a theory that a combination of genes is linked to the development of lupus.

VOA: special.2009.04.14

If your combination of numbers is chosen, you win a huge amount of money often in the millions.

VOA: special.2009.10.04

In one group,the infected man or woman began to take a combination of three antiretroviral drugs immediately after being found to have HIV.

VOA: special.2011.05.18

A treatment could include a combination of stress-reduction methods and drugs such as painkillers and steroids.

VOA: special.2009.04.14

It takes the right combination of wind,temperature,pressure and humidity to create even a weak tornado.

VOA: special.2010.05.11

The music known as salsa was a combination of Cuban "son" with other Latin sounds.

VOA: special.2009.04.19

A treatment could include a combination of stress-reduction methods and drugs like painkillers and steroids.

VOA: special.2010.06.15

Sometimes he has had to be treated with a combination of drugs in a hospital.

VOA: special.2010.03.30

He says the combination of credit card debt and big student loans is burying young people in debt and driving many of them to bankruptcy.

VOA: special.2009.04.10

Now,the World Health Organization advises use of Artemisinin-based combination treatments,or ACTs, for malaria patients.

VOA: special.2010.04.20

They must find the right combination of soil mix, water content and drying methods.

VOA: special.2009.01.12

But the drug combination can cure the disease within six to twelve months.

VOA: special.2009.10.14