听力文本

Researchers at The Ohio State University Wexner Medical Center have found that the human heart has a fail-safe, backup "battery" system that regulates heartbeats. Over 200,000 people in the United States have a pacemaker implanted each year. This translates to an average of an implant about every two and a half minutes.
俄亥俄州立大学医疗中心的研究人员发现人类心脏有一个自动防故障的备份“电池”系统，它掌控着你的心跳o&3rseZI8(。美国每年有20多万人植入心脏起搏器HsDYcJx6K!l。也就是说大约每两分半钟就有一个人植入心脏起搏器K-*PK]WIWx%qP。

The heart's natural pacemaker, known as the sinoatrial node, consists of a battery back-up system with three regions of pacemakers acting as batteries. It also has up to five conduction pathways acting as wires to connect the signal to the heart atria. These findings may help considerably reduce the number of people who need mechanical pacemakers.
心脏自身的起搏器名为窦房结，它含有电池备份系统，共有三个起搏器分区，充当着电池的作用b&w8hGnG0nOj!%OCD3。它还有多达五条的传导路径，将信号传送给心房Bgv1QXRF04PA^h。这些发现可能大大减少需要植入机械起搏器的人数s[7XDQ]p|vBI+#Tjs]n。
译文属可可英语原创，未经允许，不得转载-uARIr6Q;lUuhgH。

词语解释

1.an average of 平均是
例句：Each use case represents an average of 35 function points.
每一个用例都代表 35 个功能点的平均值f&Yo1@o=PIVVxv;G*^。

2.act as 担当，充当
例句：It can provide services and infrastructure to the students and faculties of single university acting as a private cloud.
它可以为一个大学内的学生和教师提供服务和基础设施来作为他们的私有云@rZ46p2=pkIn)tEYi;2。