多年前物理学家就知道，原子是最好的测量装置之一，原子钟就是一例。现在人们似乎感到，我们还是处在精密原子测量新黄金时代的开端，其中部分原因是由于激光冷却和操纵原子的技术刚开始发展。如像原子可以良好报时一样，原子可成为由于重力加速或地球旋转作用而产生的惯性力 Many years ago physicists knew that atoms were one of the best measuring devices and the atomic clock was an example. Now people seem to feel that we are still at the beginning of a new golden age of precision atomic measurement, partly because of the beginning of the art of laser cooling and manipulation of atoms. Like atomic well-timed, an atom can become an inertial force due to acceleration of gravity or rotation of the earth