您要查找的是不是：
- They were racing to get the satellite working in time to monitor the sun as it approaches the peak of its 11-year cycle of activity, around 2001. 他们赶着在即将来临的太阳11年活动周期的颠峰期之前修复这颗卫星，以便能及时进行监测，此颠峰期在2001年前后。
- This is the cycle of economic booms and slumps. 这是经济繁荣和经济萧条的周期变化。
- There has been a lot of activity in the town today. 今天市中心相当热闹。
- He studied the cycle of events leading to the Great Depression. 他研究了导致大萧条的一系列事件。
- a daily cycle of activity observed in many living organisms. 生物体内存在的节律性活动。
- If you impose a regular schedule, noting your feelings at the same time every day, you face the issue that mood varies predictably with time of day and regular cycles of activity. 如果你强行制定一个日程安排表来给你每天同一时刻的情绪做注释，你将会发现，情绪会随着预期时间的到来而发生有规律的循环变化。
- A cycle of the sun takes a year. 太阳循环周期需要一年。
- On the Business Cycle of the New Economy in U.S. 美国新经济周期研究。
- Patterns of activity differ between species. 同种的活动形式不同。
- Is the cycle of economic booms and slumps. 这是经济繁荣和经济萧条的周期变化。
- A year constitutes a cycle of the seasons. 一年由四季的周期循环组成
- There is a lot of activity on the stock exchange. 证券交易所买卖活动繁忙。
- A single complete cycle of such motion. 旋转一圈
- There's been a lot of activity in the centre today. 今天市中心一直是熙熙攘攘。
- A single cycle of such a disturbance. 这种振动的一个周期
- The Palace Museum was soon a hive of activity. 各项工作开展得有声有色，人文荟萃，极一时之盛。
- One cycle of processing a body of data. 处理数据体的一个周期。参阅sortpass。
- The life cycle of clay is limited. 它的使用周期是有限的。
- A center of activity or interest;a focal point. 中心；焦点活动或兴趣之中心；焦点
- The life cycle of Sparganum is unknown. 无头蚴（绦虫）属的生活史尚不了解。
