Dr. David Wilber performs a procedure called catheter ablation to treat patients with atrial fibrillation at Loyola University Medical Center in Illinois A relatively new procedure is proving to be more effective in treating patients with irregular h

发表于:2019-01-13 / 阅读(82) / 评论(0) 分类 VOA标准英语2010年(二月)

Radiation Might Help Heart Regain its Rhythm That beeping sound is the normal beating of a heart. But here's what the same heart sounds like, during a bout of ventricular tachycardia, or VT the racing beats are caused by an electrical short circuit i

发表于:2019-01-20 / 阅读(77) / 评论(0) 分类 2018年科学美国人1月

-Penny: Ooh, is this one of those paintball guns? paintball gun: 彩弹枪 paintball: 彩弹 哦这就是那彩弹枪? -Leonard: Yeah. You ought to come, out with us sometime. Yeah: yes的口语形式 ought to: 应该 come out with: 和一起出去 是

发表于:2019-01-28 / 阅读(73) / 评论(0) 分类 生活大爆炸第二季