The key to both experiments is the quantum logic atomic clock, which USES the oscillation of a single aluminium ion to maintain precise timing.
两个实验的重点是量子铝原子钟，它利用单一铝离子的震荡来精准测量时间的流逝。
2
So in experiment we should measure the length of single pendulum, then get the period of oscillation in this condition.
在实验中就要测定单摆的摆长，然后测定此摆长时的振动周期。
3
Using the single pendulum, we can research the relationship between the period of oscillation of it and the length of it and measure local acceleration of gravity.