Diseases spread internationally.

疾病在国际上传播。

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Infectious diseases spread. Water and air pollution spread.

传染病在传播，水和空气污染在传播。

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She studies how diseases spread and how they can be controlled.

她研究疾病如何传播以及可以如何加以控制。

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People around the world can prevent diseases spread by mosquitoes by removing standing water from their property.

VOA: special.2009.04.13

How diseases spread, how they can be treated or cured, when they kill somebody.

病情如何蔓延,应该怎样治疗或治愈疾病,它们什么时候会置人于死地

耶鲁公开课 - 死亡课程节选

The problem with it is that you also can spread other diseases in that way.

这个方法的问题是,其它疾病也会通过这种方式来传播

耶鲁公开课 - 生物医学工程探索课程节选

This sort of graph theory can yield insights into how sexually transmitted diseases spread and how that spread might be stopped.

ECONOMIST: What maths tells us about us

More effective repellents could play a major role in reducing the death toll from diseases spread by mosquitoes, including malaria, encephalitis, West Nile, dengue, hemorrhagic and yellow fevers.

BBC: NEWS | Science/Nature | Chemical key to mosquito biting

Louisiana farmers are using drones to hunt invasive wild pigs that carry diseases and spread noxious weeds.

ENGADGET: Inhabitat's Week in Green: flying electric car, 3D-printed livers and a two-story-tall bike