然而，倘若板载动力装置很难实现的话，他正在研究利用外部磁场给器件提供动力的途径。

Providing an on-board power supply is difficult, however, so he is investigating the use of external magnetic fields to power the device.

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多亏了摩尔定律（每隔18个月左右，[电子器件]容量就翻一番），芯片、传感器及无线电装置变得非常小且价格低廉，事实上可嵌入任何地方。

Thanks to Moore’s law (a doubling of capacity every 18 months or so), chips, sensors and radio devices have become so small and cheap that they can be embedded virtually anywhere.

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这种演示装置的特点在于，其传感器件不需要外部电源。

The special feature of the demonstrator is that the sensing elements have no need of an external power supply.

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