Low power consumption design is the identical demand for every portable system.

低功耗设计是便携式设备的普遍要求。

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This is obviously a portable system that you carry around, so we wonder how powerful it needs to be.

显然，这是一个手持可携带的系统，所以才会好奇到底它有多强大。

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The goal is a portable system that could be worn on a belt and would be no larger than a cellphone.

该研究的最终目的是开发一种可以放在腰带上手记大小的便携装置。

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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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