An interconnected array of many such cells will deliver useful amounts of electricity.

若把许许多多这样的电池连成阵列，就能提供可资利用的电能量。

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Fierer adds that it may be possible to retrieve useful amounts of bacterial gene sequences from textured surfaces that won't yield fingerprints.

菲勒补充道，也可能能够从无法产生指纹的变形表面上找到大量有用的细菌基因序列。

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Painkillers are very useful in small amounts to bring your temperature down.

小剂量的止痛药对于降低体温非常有用。

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Certainly, microwaves would work: a test carried out in 2008 transmitted useful amounts of microwave energy between two Hawaiian islands 148km (92 miles) apart, so penetrating the 100km of the atmosphere would be a doddle.

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In addition, as useful amounts of flash memory storage are now affordable, the ruggedness of flash memory and the ability to stack chips to provide slim package designs have made NAND flash the choice non-volatile storage technology for mobile devices.

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"I think it augurs some serious new - and useful - approaches to sifting through massive amounts of related data, " he said.

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