单片机守时钟
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time-keeping clock
计时时钟
以上为机器翻译结果，长、整句建议使用 人工翻译 。
One thing that propelled the great scientific, commercial, and cultural thrusts of the past 1, 000 years: time and time-keeping, which have given us navigation, the factory clock and the diminishing attention span.
ECONOMIST: Letters
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