单词：wellnitz
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Tiny Needles Treat Eye Disease 能治愈眼疾的细针 Glaucoma is the second leading cause of blindness around the world. In the United States alone, more than two million people suffer from the disease. Glaucoma results from an over-production of
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2014年VOA慢速英语(十二)月
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Microneedles 微针疗法 Female: From flu vaccin es to tetanus booster s , injections are a must in modern medicine. But do they always have to make you say Ouch? Male: Eh,no? F: No,indeed.If new microneedle technology is successful, we may soon hav
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PBS高端访谈:墨西哥城正面临日益严峻的用水危机GWEN IFILL: Violent protests continued in Mexico today. Demonstrators clashed with police in Acapulco, as anger mounted over the disappearance of 43 students. Late last week, three men d
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