This section will be used to discuss the Unknown Contacts and the Per Account Notifications, as well as, some of the other background features provided by the Advanced System Prefs patches.

这个章节将用来讨论未知联系人和通过账号的信息通知，不仅如此，还会有一些高级系统配置系列补丁后台支持功能。

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As you roll down the street, the display's background features the sun and clouds.

WSJ: Cutting Edge, for Baby

It also features noise cancellation that filters out background noise so consumers can hold crystal clear conversations in any environment.

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My test taxes the computer more than a normal user and involves keeping Wi-Fi on, cranking the screen to full brightness, turning off all power-saving features, keeping email retrieval going in the background and playing an endless loop of music.

WSJ: A Laptop Screen That Promises an Eyeful