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New Heart Stents Better Than Old Ones, Study Says A heart stent is a mesh tube made of metal that, when inserted into an artery, keeps it open. Stents can be metal only or they can contain medicine released once the stent is in place. These are calle
VOA标准英语2012年(九月)
Grammar Girl here. Today, guest writer Bonnie Trenga is going to tell us why were never gruntled, sheveled, or in whack, but why we are often disgruntled, disheveled, and out of whack. Bonnie says, Thanks to an interesting question from Glenn, well b
英语语法 Grammar Girl
to be led by the nose under your nose 今天我们要讲的习惯用语是和鼻子，也就是和nose这个字有关系的。鼻子是我们的嗅觉工具，也是我们的呼吸器官，是人体的一
美国习惯用语
New Drug Makes Surgery Safer For Patients With Stents Heart stents open blocked arteries and restore blood flow. They can also help support weak arteries and keep them open. Stents are implanted during a common procedure called angioplasty. During th
VOA标准英语2012年(一月)
General Motors Company and the United Auto Workers union reached a tentative agreement on a new four-year contract late Friday in Detroit, Michigan. Details of the settlement are being withheld, pending a review meeting with local union leaders and r
英语新闻
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
2006年VOA标准英语（十一月)