But there is still no lithium battery light enough to power a small electric car over a reasonable distance on a single charge.
但是仍没有轻易做到一次充电能为一辆小型电动车通过一段合理的道路提供电力的锂电池。
The OLED TV USES display technology based on organic materials which emit light naturally, once an electric charge is passed through them, rather than being back-lit as in LCD and Plasma screens.
OLED电视采用基于有机材料的显示技术，一旦电荷从中通过，就可发出自然光，而不是发出像液晶显示屏和等离子屏幕那样的背光。
By changing the structure of such a crystal slightly, using an electric charge, the colour of the light reflected by that crystal will change too.
依靠轻微得改变晶体的结构，利用电流的改变，当晶体改变时，光的颜色也会相应改变。
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