单词：hard cartilage
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The London Olympics are about to begin, and spectators will again be riveted by feats that would have been impossible when the modern Olympics began in 1894. Jaw-dropping records are attainable in part because of the advances in materials science. Ne
Scientific American(七)月
The London Olympics are about to begin,and spectator will again be revited by feats that would've been imposibily when the modern Olympics began in 1986. Jaw-dropping records are attainable in part because of advances in material science. New materia
Scientific American(七)月
HEALTH REPORT - F.D.A. Approves New Artificial Knee Implants for WomenBy Cynthia Kirk Broadcast: Wednesday, May 24, 2006 I'm Bob Doughty with the VOA Special English HEALTH REPORT. Women who have prob
2006年慢速英语（五）月
Scientists Test New Treatment for Injuries that Produce Arthritis American researchers are looking for new ways to reduce arthritis pain. Arthritis is known to affect older people. Over time, the joints of the body suffer damage and become inflamed.
2018年VOA慢速英语(二)月
This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Animals that live in cold climates tend to have stubby limbsshorter arms and legseven smaller ears and tails. Picture a penguin and youll see what I mean
Scientific American(十二)月
WASHINGTON, Feb. 19 (Xinhua) -- NBA's Philadelphia 76ers announced Tuesday that their guard Jason Richardson has undergone successful knee surgery. The 12-year NBA veteran, who has not played for a month and will be sidelined for the rest of the seas
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