单词:gastrologist
[医] 胃病学家
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This is Scientific American's 60-Second Science, I am Karen Hopkin. This'll just take a minute. Biologists, traditionally track migrations by tagging animals with devices that allow their movements to be monitored. But Homo sapiens can't be fitted wi
AS IT IS 2013-05-29 A Call for Citizen Scientists to Help Map CO2 Gas Welcome to As It Is, the daily magazine show from VOA Learning English. Im Mario Ritter. A music video shot in space? That is now a reality. Today, we hear how Skylab led the way f
By Carol Pearson Washington, DC 08 November 2006 watch Heart Stent report Heart stents are lifesaving medical devices that help prevent heart attacks. Most of these stents are coated with various drugs, but mounting data suggest drug-coated stents c
By Bill Gasperini Moscow 09 April 2006 Russia's state-controlled gas monopoly, Gazprom, says it plans to triple the price that neighboring Belarus must pay for its gas. Gazprom has already raised the