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把剑长歌
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北京钟楼,国保第四批单位。钟楼上展出的报时铜钟,铸于明永乐年间,钟通高7.02米,钟体高5.55米,下沿直径3.4米,壁厚为0.12—0.245米,重63吨,堪称“古钟之王”。
古代人们把每夜划为五更(古代夜间计时单位,每更次为一个时辰,相当于现代的两个小时),即黄昏戌时(19时至21时)曰定更;人定亥时(21时至23时)曰二更;夜半子时(23时至晨1时)曰三更;鸡鸣丑时(晨1时至3时)曰四更;平旦寅时(晨3时至5时)曰五更,又曰亮更,即天明之意。定更和亮更报时皆先击鼓,后撞钟;二至四更报时则只撞钟。每晚戌时定更,钟声响,城门关,交通断,称“净街”。
古代人们把每夜划为五更(古代夜间计时单位,每更次为一个时辰,相当于现代的两个小时),即黄昏戌时(19时至21时)曰定更;人定亥时(21时至23时)曰二更;夜半子时(23时至晨1时)曰三更;鸡鸣丑时(晨1时至3时)曰四更;平旦寅时(晨3时至5时)曰五更,又曰亮更,即天明之意。定更和亮更报时皆先击鼓,后撞钟;二至四更报时则只撞钟。每晚戌时定更,钟声响,城门关,交通断,称“净街”。
24天前2024-05-22
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