The current iPhone OS (3.0) only allows a few core apps, such as iPod and Mail, to run in the background while another app is active.

目前3.0版本只允许少数核心应用程序，如iPod和邮件，在后台运行而另一个应用程序处于活动的状态。

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He said their core focus included "home page, mail, search, and mobile."

他说公司的核心业务包括了“主页、电邮、搜索和移动业务”。

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The core of the protocol, used for sending, receiving and handling E-mail, are fine.

用于收发和处理电子邮件的协议核心没有问题。

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"It's clear that the more delivery work which is done by private companies, the less there will be for Royal Mail, and core services could suffer with higher prices and lower service standards, " said CWU deputy general secretary Dave Ward.

BBC: Royal Mail faces a spiral of decline, chief executive says

Traffic for core products such as search and mail were down 24% and 12%, respectively, in December 2012 compared to December 2011.

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