即电子邮件，系英文“e-mail”的音译e-mail

• 她刚刚学会发“伊妹儿”。

  She has just learned how to send e-mail.

• 买了张双程飞机票，立即用“伊妹儿”告知大陆朋友。

  One bought a return plane ticket and immediately told one's friends in Mainland China using e-mail.