但另一种无需电力即可冷藏食物的方法是使用蒸发式冷却盒。

But another way to keep food cool without the need for electricity is to use an evaporative cooler.

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混合动力技术，(结合了电力电池盒汽油驱动的后备引擎)已经确立。

Hybrid technology, combining electric batteries with a petrol-driven back-up engine, is well established.

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用一个电池盒，设计出12伏的电力系统，使用“断网”发电法就可以储存电力了。

Electricity can be stored through design of a 12v electrical system using a battery bank and means of "off grid" generation.

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