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SSS 2008-09-04

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Conditions such as mad cow disease are caused by abnormally shaped proteins, called prions. Prions spread by causing other, normal proteins to misfold

发表于:2018-12-24 / 阅读(342) / 评论(0)

Scientific American(九)月

SSS 2009-03-02

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Its like the molecular version of the Joker and the Riddler teaming up against Batman. Scientists at Yale University have discovered that amyloid beta, a

发表于:2019-01-08 / 阅读(439) / 评论(0)

Scientific American(三)月

VOA标准英语2009年-obama's Chioce For Commerce Secretary Withdraws

President Barack Obama's choice to lead the Commerce Department, Senator Judd Gregg of New Hampshire, has withdrawn his nomination. The Republican lawmaker cites differences with the Democratic president over policy issues, including an economic rec

发表于:2019-01-13 / 阅读(403) / 评论(0)

VOA标准英语2009年(二月)

美国国家公共电台 NPR Prion Test For Rare, Fatal Brain Disease Helps Families Cope

RACHEL MARTIN, HOST: Scientists have developed a better test for a very rare brain disease. And as NPR's Rae Ellen Bichell reports, this test could lead to new ways to diagnose more common diseases like Parkinson's and Alzheimer's. RAE ELLEN BICHELL,

发表于:2019-01-16 / 阅读(378) / 评论(0)

2017年NPR美国国家公共电台2月

Nocerino scores hat-trick as AC Milan beats Parma 4-1

ROME, Oct. 26 (Xinhua) -- Antonio Nocerino turned out to be the unexpected hat-trick hero as AC Milan beat Parma at home on Wednesday to notch up their third consecutive Serie A victory. Nocerino broke the deadlock at San Siro in the 30th minute. Zlt

发表于:2019-02-04 / 阅读(689) / 评论(0)

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学英语单词

actively mode-locked Nd glass laser

actuator logics

agar gel electrophoresis

agreed price range

air brake switch

alekseyevka (alekseyevka selo)

alternate non-card device source