cycle of activity meaning in Chinese
活动循环；商业循环
Examples
- We all know that normal human daily cycle of activity is of some 7 - 8 hours ' sleep alternating with some 16 - 17 hours ' wakefulness and that , broadly speaking , the sleep normally coincides with the hours of darkness
我们都清楚正常人每天的活动周期是大约7 - 8个小时睡眠和16 - 17个小时清醒轮流相互交替，我么也知道，一般来说，睡眠常在夜间进行。