In recent decades, mosquito vectors of chikungunya have spread to Europe and America.

最近几十年，基孔肯雅热的蚊子媒介已传播到欧洲和美洲。

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It is believed to have originated in South America in the early 1900s, and later spread to Europe before crossing over to sub-Saharan Africa.

它被认为是在20世纪初起源于南美洲，后来传播到欧洲，然后跨越到撒哈拉以南的非洲。

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In recent decades mosquito vectors of chikungunya have spread to Europe and the Americas.

最近几十年，基孔肯雅热的蚊子媒介已传播到欧洲和美洲。

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But the problem is expected to spread to Europe, where a similar accelerator part is used.

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Because Mexico is a popular tourist destination,Swine Flu quickly spread beyond North America to parts of Europe and Asia.

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In the past several days, the virus has spread to Canada, the United States,New Zealand, Israel and Europe.

VOA: standard.2009.04.28

The Black Death is thought to have originated in China and spread to Europe through trade.

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Morgan and spread to Europe and around the world during the Great War.

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This trend, which began in America and then spread to Europe and Japan, is now visible in the Asian tigers.

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