单词：tracer-level activity
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Part I Warming up Tape-script: A What is the most popular sport in the United States? That may be an impossible question to answer. There are different meanings of the words most popular. One way to measure the popularity of a sport is by the number
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The local share market started the session flat but is now trading lower following Wall Street lead. If we take a look at the figures,the All Ords is down 26 points or about half percent.The ASX 200 offers a little more down 27 points.The Wall Street
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This is Scientific America's Sixty-Second-Science. I am Steve Mirsky. Got a minute? Some interesting electrical activity in the clouds of ash drifting around Europe as a result of that Icelandic volcano. Models predicted that electrical charge should
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Increased activity from Mount Merapi, one of Indonesia's most active volcanoes, is stirring fears of an imminent eruption. Mount Merapi sits in a lush valley in Central Java. Last week, the volcano jumped to action. Since then the number of tremors h
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BEIJING, March 29 (Xinhua) -- Chinese President Xi Jinping on Wednesday stressed the importance of afforestation and urged people, especially the young, to understand and protect nature via tree planting activities. Chinese PresidentXi Jinpingtalks w
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