EPI

例句：

1. 1. The E-mail system is a great way to communicate with people all over the world.
   电子邮件系统是与全世界人们进行沟通的好方法。
2. 2. The E-mail system has greatly improved communication between people.
   电子邮件系统极大地提高了人与人之间的沟通。
3. 3. The E-mail system has made it easier for people to stay in touch with each other.
   电子邮件系统使人们更容易保持联系。