| 释义 |
原子钟yuánzǐzhōng利用铯、铷等原子的稳定振荡频率制成的极精密的计时器,计时误差每日可小于百万分之一秒。{atomic clock; extremely accurate clock regulated by the steady vibration frequency of atoms of certain substances, e.g. caesium, rubidium, etc., measuring the time of a day with a tolerance of less than 1/1,000,000 second} |