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两位英国的设计人员已研制出一种便携式光源,用于发展中国家和灾害地区。此种白光发光二极管体积为107mm×99mm×25mm,使用太阳能板和可充电电池供能,比油灯和蜡烛安全、便宜。
Two British designers have developed a portable light source for use in developing countries and disaster areas. Such white light-emitting diodes are 107mm × 99mm × 25mm in size and are made from solar panels and rechargeable batteries that are safer and cheaper than oil lamps and candles.