单词：pacemakers
n. a specialized bit of heart tissue that controls the heartbeat
n. an implanted electronic device that takes over the function of the natural cardiac pacemaker
单词：pacemakers 相关文章
BOB DOUGHTY: This is SCIENCE IN THE NEWS in VOA Special English. I'm Bob Doughty. FAITH LAPIDUS: And I'm Faith Lapidus. Today, we will tell how technology used in airports may help in the study of disease. We will tell about an idea for improving hea
2010年VOA慢速英语(六)月
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
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