This cyclic weather system normally occurs once every two to seven years, and last reared its head in 2007.
这种气候系统的循环每2到7年发生一次，上次抬头是在2007年。
2
At last, this paper introduces the cyclic machine printing management, and gives the design and implementation of the system.
论文最后给出了基于工作流思想的轮转机印刷管理系统的设计和实现。
3
Cyclic economy is a close ring feedback cycle process of "resources-products-reborn resources", realizing "the best production, the most proper consumption, the least waste" at last.