养殖场外多种树 (2)
提示:George Malone
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控制霍乱新方法(2)
有一种低成本的口服疫苗可以有效保护人们免受霍乱的侵害...Ira Longini at the Fred Hutchinson Cancer Research Center in Seattle, Washington, led the new work. A team from the United States, South Kor...
发展中国家孕妇需要补充维他命(2)
科学家发现,孕妇补充复合维他命可以有效降低产生低重婴儿的几率The scientists compared the findings with results from a group of 4000 women who did not receive the vitamins. A report by the scientis...
纪念日演唱会悼念逝者(1)
华盛顿市中心举行了一场大型的演唱会悼念逝者It is a huge event, drawing hundreds of thousands of people to the West Lawn of the Capitol building in the heart of Washington. The concert is seen thro...
异形蚊子(1)
科学家正在进行异形蚊子在抵御疟疾病流行的研究The spread of malaria is like a two-way street. The disease is spread to humans through the bite of mosquitoes infected with malaria parasites, the mos...