Thee most commonly used network service is electronic mail (E-mail), or simply as mail.

最常使用的网络服务是电子邮件，或简称邮件。

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This article discusses the applications area, excellence, shortcoming of E- mail in reference service, devises how to develop the reference service via electronic mail.

本文明确了电子邮件参考服务的重要性，讨论其在参考咨询中的应用范围、优缺点，并提出开展电子邮件参考服务的方法和问题。

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