motion that recurs over and over and the period of time required for each recurrence remains the same
双语例句
The harmonic oscillator is an exceptionally important example of periodic motion. 谐振子在周期运动中是特别重要的。
The chaotic motion can be controlled to a regular motion via stabilization of the chaotic orbit onto an unstable periodic orbit embedded within the chaotic attractor. 利用压缩映射和线性逼近产生一个参数微扰反馈序列，使混沌轨道稳定在嵌入混沌吸引子内的一个不稳定周期轨道上，实现将混沌运动转化为周期运动。
