单词：friction testing machine
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Once there lived a woodcutter in a village in Arabia. His name was Ali Baba. He was very poor. One day he was cutting the trees beside a mountain near by. Suddenly he heard some hoofing sound. So he climbed up the tree to watch seriously and carefull
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But my response to this robot was also interesting because I knew exactly how this machine worked, 但我对这个机器人的反应也非常有趣，因为我确切地知道这个机器工作的原理， and yet I still felt compelled to be kind to
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368. Progress of Invention. 368．发明方面的进展 The electric telegraph was now in common use. 此时电报已经投入日常使用， It enabled the newspapers to tell the people what was going on as they never had done before. 它使得报纸可
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LONDON, April 11 (Xinhua) -- The Olympic Torch has passed rigorous testing to ensure even the worst of Britain's weather will not be able to put it out, the Evening Standard newspaper said Wednesday. Two prototypes withstood 50mph winds, extreme temp
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The Large Hadron Collider, the world's most powerful atom smasher, has gotten under way. Physicists at the European Organization for Nuclear Research, CERN, in Geneva successfully injected the first beam of particles into this colossal multi-billion
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An independent panel of U.S. health experts is recommending that all Americans between the ages of 15 and 65 be routinely screened for HIV, the virus that causes AIDS. The HIV test would not be mandatory. But experts hope more widespread testing migh
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