cesium atom的用法和样例：
例句
- Unlike pendulums and crystals, all cesium atoms are identical.
不同于钟摆及石英晶体的是，所有的铯原子都是一模一样的。 - In some of them, the resonant frequency of cesium atoms remains amazingly stable, becoming a pseudo-pendulum capable of maintaining near nanosecond precision.
有些原子钟里，铯原子的共振频率极为稳定，功能相当于钟摆，精准度可达奈秒。
