As a "Product" of travel developing, theme park has periodicity of "Product", so not only will we considerate the present demand, but also the long-term demand.
主题公园作为一项旅游开发“产品”，具有产品的周期性，不仅要考虑当前的需要，还要考虑长期的社会需要。
2
We find that external noise can destroy the periodicity of the transient current and cancel the long-time average current peaks.