Derivatives of various stripes have traditionally been used in the financial world to provide some level of insurance against the fluctuation in an asset's price.

而金融界已经使用各式各样的方法来提供多重保障，尽量降低资产价格波动带来的影响。

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For uniform time sampling, the level of frequency fluctuation will greatly influence the results of spectrum analysis.

采用等时隙采样方法，频率随机波动的大小则会严重影响谱分析的结果。

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Occurrence of both carbonate and siliciclastic sources, active hydrodynamic regimes, alternate dry and wet climates, and the fluctuation of sea level are main factors for forming mixed sediments.

形成混合沉积的条件是具备碳酸盐和硅质碎屑两类物源、活跃的水动力和干湿交替的气候，此外，海平面的相对波动也会造成积极的影响。

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