Unverified90% confidenceDecision RuleTime unknown
卧室挂钟必须选连续扫秒（sweep movement）机芯而非跳秒（step movement）机芯，跳秒机芯每秒有约30分贝的滴答声在夜间会明显影响睡眠，扫秒机芯基本静音
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90%
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Long-term
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