单词：routes of inoculation
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[00:06.14]See, what I didn't want was to turn out boys 我不想去培养这样的一批人 [00:10.22]who would claim in later life to have a deep love of literature. 他们以后才会说深爱着文学 [00:12.82]Or who would talk in their middle ag
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The History Of Smallpox天花的历史（双语） In Shakespeares day, wishing a pox on someone was a terrible curse. Ten percent of the population in 17th century London died gruesomely of smallpox, a virus spread easily by airborne particles or co
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Next time your parents tell you a penny save does a penny earn,you tell them not always!!We're gonna tell you how much more a peny is worth a little later on today.CA, welcome to a new week of CNN student news. First up today,we are talking about U.S
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By Lisa Schlein Geneva 05 October 2007 The U.N. High Commissioner for Refugees, Antonio Guterres, says Iraqis fleeing violence and persecution are finding fewer avenues of escape and he is appealing to countries to keep borders open to Iraqi asylum s
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Economics Brief 经济学简介 Six Big Ideas 六大经济理论 Human capital: The people's champion 人力资本：人的捍卫者 Gary Becker made humans the central focus of economics. The second in our series on big economic ideas. 贝克尔让人
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By CCTV Tang Bo Chinas three major hepatitis B vaccine makers have been ordered to suspend production. The countrys Food and Drug Administration made the announcement after the companies failed to get certified under the new Pharmaceutical Products s
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