"There is a need to break the on-again-off-again cycle of our military-to-military relationship,".

VOA: standard.2009.10.27

They start on Thursday and go through a Monday cycle.

从周四开始到下周一是一个循环

耶鲁公开课 - 聆听音乐课程节选

So you know your cycle, you know, you could have a whole complicated sequence on a p v diagram of steps going back.

因此，对某一的循环过程，可以在pV图上画出,一系列很复杂的小步骤。

麻省理工公开课 - 热力学与动力学课程节选

He called on a new generation of Africans to build democracy, create opportunity,fight corruption, and end the long cycle of strongman rule and conflict on the continent.

VOA: standard.2009.07.11