This paper expounded the principle, develop, characteristics and types of fuel cell in an introductory mood and pictured its prospect.

论述了燃料电池的原理，详细分析了燃料电池的特点和类型，并对其发展前景作了展望。

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The principle and the application model of full cell in vehicle are introduced. The structure and energy flow control strategy of fuel cell hybrid vehicle are described.

介绍了燃料电池的工作原理及其车辆应用模型，并在此基础上进一步阐述了燃料电池混合驱动汽车的结构与其能量流的控制管理策略。

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Abstract: this paper mainly introduces the PN of solar cell structure, working principle, classification method and improving the efficiency of conversion.

摘要：该文主要介绍太阳能电池的PN结构、工作原理、分类和转化效率的提高方法。

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Dr Lorenz Studer, head of the Stem Cell and Tumor Biology Laboratory at the centre, and the lead researcher on the study, told BBC News Online that the study was "proof of principle" that cloned embryonic stem cells could be reliably transformed into a variety of useful cell types.

BBC: NEWS | Health | Mouse cloned to cure Parkinson's

And we have absolutely no way to calculate in principle all the possible interactions and functions of a single protein with the tens of thousands of other proteins in the cell!

FORBES: What's the Likelihood of the Singularity? Part Two: Uploading the Brain