The PID string and ITEMTYPE name are used later to retrieve the content data and compose an e-mail notification.

PID 字符串和 ITEMTYPE 名称在后面会用于查询内容数据和创建电子邮件通知。

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Line 4 encodes the string Double secret probation and USES Base64 to turn the encrypted string into printable characters that can easily be transmitted over E-mail, say.

行4编码字符串Double secret probation并使用Base64将加密了的这个字符串转变为可打印的字符，以便于用电子邮件等程序传输。

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The definition string contains the template definition (the static portion of the E-mail), which can make references to outside variables (the dynamic portion).

definition字符串包含模板定义(电子邮件的静态部分)，它可以对外部变量(动态部分)进行引用。

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But the move follows a string of incidents where either security in Passport - or the Hotmail free e-mail system to which it is tightly bound - has proved to be lax.

BBC: New flaw puts Passport offline