“就得到完美电池而言，我们还有很长的路要走，” Thackeray 博士说道。

“We've still got a long way to go in terms of getting the ultimate battery,” says Dr Thackeray.

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迄今为止，没人能找到一个方法把热能和太阳能电池转化科技完美的结合在一起。

Until now, no one had come up with a way to wed thermal and solar cell conversion technologies.

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不过，要缩小这些飞行引擎、电池、机械促动器、中控电子装置，以使这些飞行器够轻够小地完美飞行，还是相当困难。

But it remains hard to shrink engines, batteries, mechanical actuators and control electronics to the point where they are small and light enough to fly without impairing their performance.

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