Photocatalysis has been widely used in wastewater treatment, air cleaning, sterilization, antifouling and self-cleaning materials, dye-sensitized solar cell, cosmetic, air sensor, etc.

光催化技术在废水处理、气体净化、杀菌、防污、自洁材料、染料敏化太阳能电池、化妆品、气体传感器等许多领域有着广泛的应用。

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If its sensor feels the air becoming dry, a smart sprinkler (洒水器) could water your plants by itself.

如果它的传感器感觉到空气变得干燥，智能洒水器会自行给你的植物浇水。

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After environmental testing, the sensor will go to the Air Force Research Laboratory for further evaluation.

在环境试验中，传感器将在空军研究试验室进行进一步的评估。

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The same goes for the mass air flow sensor, which calculates the amount of air coming into the car and determining yhow much fuel to shoot into the engine.

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It recently released a new air freshener with a motion sensor to tell it when to spray its perfume, which is a fifth more expensive than the humbler sort, for example.

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In fact, Mitsumi says these can be integrated into the RF sensor network of large air conditioning facilities, as an RF transmitter can run on very little power these days -- even less than a calculator.

ENGADGET: Mitsumi exhibits micro-vibration power generator and batteryless RF switch (video)