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This is Scientific America's 60-Second Science. I am Karen Hopkin. Thisll just take a minute. Research on acupuncture just got a shot in the arm. Well, a needle near the knee, actually. Because a study in the journal Nature Neuroscience has uncovered

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Many of the Burgess specimens have now been assigned to living phyla just where Walcott put them in the first place. 许多布尔吉斯标本现在已经归到活着的动物的门里就是沃尔科特最初放置它们的地方。 Hallucigenia and s

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net indebtedness 净负债额 net inflow of fund 资金流入净额 net insurance liabilities 保险负债净额 net interest margin 净利率差距 net interest paid 实付利息 net liabilities 净负

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