He said the North Korean launch proves the need for nations to cooperate to stop the spread of nuclear weapons and to remove those that already exist.

VOA: special.2009.04.11

One can stop spread of disease through a community without being 100% effective in each person who gets the vaccine.

疫苗能够遏制疾病在整个社区中传播,虽然对于每个人来说它并非百分之百有效

耶鲁公开课 - 生物医学工程探索课程节选

"We are working with our partners to stop the spread of nuclear weapons and to seek a world free of nuclear weapons.

VOA: standard.2010.02.06

Authorities in Queensland have put strict precautions into place to try to stop the spread of infection from the Pacific Dawn cruise ship.

VOA: standard.2009.05.30

Some scientists have said the government should cancel large sporting events and close schools to try to stop the spread of the respiratory disease.

VOA: standard.2009.05.30

Earlier findings showed that happiness, obesity and the ability to stop smoking can also spread like infections within social groups.

VOA: special.2010.01.06

But the prime minister also admits that in a country where HIV and AIDS victims are often abandoned by their families, fear of the disease could make it almost impossible to stop its spread.

VOA: standard.2009.04.04

We have a big job on our hands,". Borlaug expressed concern about a new variety of wheat stem rust attacking wheat plants in Africa and advocated greater coordination of researchers around the world to stop its spread.

VOA: standard.2009.09.13