单词:immunosuppressive drugs
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By David McAlary Washington 18 February 2007 The U.S. space agency NASA has launched five satellites - the most ever from one rocket - to locate the source of energy in Earth's magnetic field that triggers the colorful, dancing auroras over the north
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Astronomers have detected the brightest explosion ever witnessed in the heavens. It was a flash of light from across our galaxy so powerful that it bounced off the Moon and illuminated Earth's upper atmosphere. The researchers say if the blast had oc
China's first permanent magnetic monorail train has successfully completed a test run in the city of Qingdao, in Shandong Province. The high-tech urban transportation system features strong climbing capacity, a small turning radius, energy efficiency
台湾籍旅美老师今天交给我们的句子是: A calorie is a unit of energy. It's technically the amount of energy needed to heat up a kilogram of water by 1 degree Celsius. 卡路里是能量的单位。他是一公斤的水上升摄氏一度