| 释义 |
contraction of heart
基本例句
心脏收缩
As the heart falters, the body releases adrenaline to keep the organ pumping.例如心颤患者，体内释放的肾腺上素能保持心脏收缩力。
One set of wires tells the pacemaker what the heart's contraction rate is.Another set of wires tells the heart to contract if the rate is too slow or too erratic.一组导线告诉心脏的收缩频率，另一组导线在心率太慢或不稳定时让心脏收缩。 |