cycle per second

例句：

1. 1.The cycle of the sun is about 24 hours.
   太阳的周期大约是24小时。
2. 2. The machine operates at a cycle rate of 50 cycles per minute.
   这台机器以每分钟50个周期的速度运行。
3. 3. The cycle of life is a reminder of our mortality.
   生命的循环提醒我们生命的短暂。