To resolve the non-gauss noise problem such as wave fluctuating acutely at sea, a new algorithm for extracting object contour is presented.

针对波浪持续起伏较大的非高斯噪声，提出了一种目标轮廓提取的新方法。

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And with the process of population aging was speed up in rural area. The fluctuating of mortality was influenced by demographic and non-demographic factors in common.

农村地区人口老化程度加快，人口因素与非人口因素共同影响死亡率的变化。

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Problems associated with this reliance on petroleum include fluctuating petroleum costs, uncertainty of supply and ultimately concerns relating to the depletion of these non-renewable fossil fuels.

和依赖石油相关的问题包括石油成本的波动，供应不稳定，并且最终的问题是这些不可再生的旧资源的枯竭。

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