LEDs have been around for some time, but mostly blinkingaway as little red indicator lights in electronic equipment.
LEDs问世有一段时间了，但是主要作为电力器件上可以忽略不计小型红色指示灯。
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With that blinking cursor on our Internet search box only a button away and ever ready to unleash a geyser of electronic information, no longer do we have to go into any encounter wholly unprepared.