单词：artificial cardiac pacemaker
单词：artificial cardiac pacemaker 相关文章
Pacemakers are expensive. Though some pacemaker manufacturers have dropped the price down to $800 in poorer countries, thats still out of reach for many. One to two million people die each year because they dont have access to this life-saving techno
Scientific American(十)月
1. NASA will have to try again tomorrow. Bad weather forced Mission Control to call off today's scheduled launch of Discovery at the last minute. NASA will try again tomorrow but bad weather is still
美联社新闻一分钟2006
This is the VOA Special English Health Report. A pacemaker is a small device that doctors place in people with an abnormal heartbeat. If a heart beats too slowly, the pacemaker will use electrical signals to help set a normal rate. Some devices inclu
2010年VOA慢速英语(六)月
Major Progress in Health Through Technology From VOA Learning English, this is SCIENCE IN THE NEWS in Special English. Im Bob Doughty. And Im Faith Lapidus. Today, we tell about a woman who can use signals from her brain to move a robotic arm. We tel
2013年VOA慢速英语(五)月
By Carol Pearson Washington 25 July 2007 You may have heard about young athletes, still teenagers, whose hearts stop beating, sometimes while playing sports. In many of these cases, their parents and doctors find out after the fact that these young a
2007年VOA标准英语（七月）
From VOA Learning English, this is SCIENCE IN THE NEWS in Special English. Im Bob Doughty. And Im Faith Lapidus. Today, we tell about a woman who can use signals from her brain to move a robotic arm. We tell about efforts to develop an experimental g
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