sleep-wake cycle

例句：

1. 1.The body's sleep-wake cycle is regulated by the brain.
   身体的睡眠-觉醒周期由大脑调控。
2. 2. The cycle of life is a reminder of the importance of rest and rejuvenation.
   生命的循环提醒我们休息和恢复的重要性。
3. 3. During the sleep-wake cycle, our bodies undergo various physiological changes.
   在睡眠-觉醒周期中，我们的身体状况会经历各种生理变化。