As we did for USERNAME in the previous step, set the value as required on the validation TAB, and set the control up to display validation error messages in an error message control.

如我们上一步对USERNAME做的一样，将验证选项卡上的值设为必须，然后在错误消息控制中设定显示验证错误消息。

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The milestone sends notification messages to set up all of its alert timers and notifications.

里程碑发送通知消息以建立它的所有警报定时器和通知。

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It's like your personal assistant, helping you focus on the messages that matter without requiring you to set up complex rules.

它就像你的私人助理一样，帮助你随时注意那些重要邮件，而不需要你设定复杂的规则。

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Delivery times have gone from an average of three hours -- and from highs of several days -- to an average of three minutes, mainly because the new system, unlike the old one, was set up so that messages only travel as far as they need to in order to reach their recipients.

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The Samasource partner in Haiti was set up to translate text messages from Creole to English.

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Sites like mint.com can be set up to send text messages to your phone if you start spending more than your target in a particular area.

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