In a real implementation, each event would include some type of patient identifier that would be used to find the doctor's E-mail address from an external data source.

在一个真实的实现中，每个事件都将包含某种类型的病人标识符，用于从一个外部数据源查找医生的电子邮件地址。

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The effect is similar to the use of external images to track E-mail.

由此带来的影响类似于使用外部映像跟踪电子邮件。

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Many others work with external systems, such as the open-source GPG, to encrypt e-mail.

许多人使用外部系统（比如开源的 GPG）来加密电子邮件。

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In his statement Thursday, Ryley said Sky News had commissioned an internal audit of payment records, alongside the external review of e-mail records.

CNN: UK broadcaster Sky News admits e-mail hacking

TeleCruz designs a system-on-a-chip that equips a TV set's innards with modest e-mail and Web capabilities without the need for fancy external electronics.

FORBES: Cruz Control