The technology is finally becoming practical, from tiny fuel cells to replace batteries in portable devices to large ones that can power buildings.

最终这种技术被变为现实，现在不论是小型燃料电池，又或者是移动装置中的可替换电池还有为建筑提供能源的电池都可以见到它的身影。

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This paper summarizes the rules of the agricultural buildings' spatial distribution, provides a Portable GPS-based collection method and studies its function module and realization.

本文研究了设施农业空间位置分布规律，提出了一种基于便携式GPS的设施农业信息采集方法，并对本系统的模块及实现进行了研究。

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One-third of classrooms in the state are held in portable or modular buildings, many of which are desperately in need of maintenance and energy retrofitting, and some of which are actually toxic because of the chemicals they contain.

FORBES: California To Invest $2.5 Billion To Retrofit Energy-Wasting Schools

The two institutes have developed compact and portable x-ray devices capable of analysing the structure and chemical composition of ancient bones, buildings, and art objects in a non-destructive fashion.

UNESCO: Basic Sciences