The first ones to come into wide use—glowing a space-age red—turned up in the clock radios, pocket calculators, and digital watches of the 1970s.

二十世纪七十年代，这些发着红光的二极管在太空时代被广泛使用，它出现在收音机闹钟，袖珍计算器以及电子手表上。

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Now consider noise.If a ticking clock disturbs you, buy one that doesn't tick, or use your phone.Turn clock radios and MP3 players to the wall and cover lighted screens.

现在考虑噪音：如果钟表的滴答声让你无法入睡，那就买一个不发声的，或者用你的手机来代替钟表。

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He found himself working on such items as cheap clock radios, which gave him little scope for creativity.

WSJ: Brian Kane, Furniture Designer | Creating

The expected triumph of digital radio has receded into the future: almost three-quarters of radios sold in Britain are still analogue (digital boosters forgot about all those clock radios and car radios).

ECONOMIST: The unexpected rise of amateur radio broadcasting