Every new user gets an activation code to activate his account when he gets an E-mail with a link in it.

每个新用户可以通过一个带激活码链接的电子邮件来激活他的帐户。

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XP required users to activate their copy with a 50-number code over the web, or by ringing Microsoft.

XP系统要求用户在网上使用他们的50位激活码激活系统，或者

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This example above shows how to activate an MBean implemented in your J2EE application code.

以上这个示例说明了如何激活在J2EE应用程序代码中实现的MBean。

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Another adds an extra level of security with a code needed to activate the card.

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If you buy it at a retail store, you're getting only a 25-character code, which you use to activate the software after downloading it at home.

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Now Microsoft ties the code to one machine and requires that you "activate" it.

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