单词：Flattnitz
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Remembering Earl Scruggs Before Earl Scruggs, most banjo players used a two- fingered picking style. But all that changed after the 21-year-old North Carolina native joined Bill Monroes Bluegrass Boys in 1945, and brought his three- fingered rolls to
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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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