A desktop or portable system can be left on for weeks, even months, and server uptime can stretch to a year or more.

桌面或便携系统可能连续运行几周甚至几个月，而服务器可能连续运行一年甚至更长时间。

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The MacBook Pro is really Apple's creme de la creme, the no-compromises laptop for the Apple professional that absolutely needs the fastest, biggest portable system Apple has to offer.

MacBook Pro确是苹果系列的佼佼者，专业人士无疑需要最快，最大型的掌上系统，而这款便是苹果能为其提供的不二选择。

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Combining the traditional acoustic positioning system with the vector hydrophone, we have designed a new portable system named as the long base line passive acoustic positioning system.

将传统的水声定位系统与矢量水听器相结合，设计了一种全新的轻便型长基线被动水声定位系统。

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Steven Russell, director of Massachusetts General Hospital's Diabetes Unit and co-author of the study, the next step is for researchers to develop a portable system about the size of a cellular telephone.

VOA: standard.2010.04.15

However, on a portable system that has to rely on the battery, power becomes a precious commodity.

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The idea of gaming on an ultra-portable system with an 11.6-inch screen sounds great until you try it.

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Nintendo's portable system, the DS, sold 1.6 million units in December alone, for full-year sales of 5.3 million.

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