Additionally, prediction models can take into account cyclical patterns, such as a seven day weekly cycle or a quarterly cumulative sales trend.

此外，预测模型还可以考虑使用循环模式，如七天的周循环或每季度累计销售趋势。

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Behind this cyclical burst of activity is a deeper trend.

这类活动的周期性爆发背后隐藏的是一股更深层次的趋势。

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Strong market rallies — even three - to four-year cyclical bull markets — can take place inside a longer bear market trend.

股市强势上升——甚至升个3到4年的周期性牛市——在长期大熊趋势中也是可能的。

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Although politics tends to be cyclical, voter trend researcher Bruce Gyory doesn't see a conservative wave coming.

WSJ: Analysis: In liberal NY, conservatives fight back

The second interesting observation is that 7 out of 8 of the cyclical bull markets within the long term trend lasted for several years, and did not end until the market was back to its level achieved at the peak when the secular bear began.

FORBES: This Bull Market Could Hit Old 2000 Peak Before Ending