That the cyclical change of the shape of the mantle produces potential energy force in earth's crust results in crustal movement.

地幔圈形状周期性变化使地壳产生势能（位能）力导致地壳运动。

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Palin also restated her view that climate change is largely due to cyclical changes in the earth's atmosphere and not primarily caused by human behavior.

佩林还一再重申她在气候变化方面的观点，她认为气候变化主要归因于地球大气层的循环变化，而不是主要由人类行为所导致。

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According to this article, the cyclical change of the natural factors is the main factor to the Sand-Dust weather, while artificial factors make strengthen action.

分析认为，自然因子的周期变化是造成沙尘天气分布和变化的主要原因，人为因素起了加强作用。

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You get a sense there's been a more than cyclical change in risk appetite amongst the community, which is why the savings rate has gone up to historical highs and in businesses, boards have changed their attitudes to risk.

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"Music is cyclical and it does change, " he said.

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If so, keep in mind that it would not change the fact that particularly in secular bear markets, the cyclical bull markets tend to run into significant declines in their unfavorable seasons each year.

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