People think Mei Lanfang played an important role in the spread of Beijing Opera because he was the first to introduce Beijing Opera to foreigners.

人们认为梅兰芳在京剧的传播中发挥了重要作用，因为他是第一个将京剧介绍给外国人的人。

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The role of migratory birds in the spread of highly pathogenic avian influenza is not fully understood.

候鸟传播高致病性禽流感的作用尚不完全清楚。

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And, he added, when the same sort of effects show up in the spread of obesity as in the decline of smoking, that should be a signal.

他还说，肥胖扩散与烟民减少之间出现的相同效应已传递出了一个信号。

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Dr.Fauci says earlier treatment led to a ninety-six percent reduction in the spread of HIV to uninfected partners.

VOA: special.2011.05.18

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

The plant based economies began in the Middle East and then they spread to the rest of the world.

农耕经济由中东地区开始,发展并传播到全世界

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Sex between old men and young women is a crucial factor in the spread of the epidemic.

ECONOMIST: Women and HIV

Conservationists also argue that live animal markets have played an important role in the spread of H5N1.

ECONOMIST: The aves, and ave nots

The danger is that lulls in the spread of disease can come and go, encouraging people to drop their guard.

ECONOMIST: Getting better, or worse? | The