Added underwater blur effect.

增加水下模糊效果。

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The effect of working parameters on the erosion performance of underwater jet is investigated, such as , simulated depth, stand off distance and exposure time.

试验研究了模拟水深、靶距及冲蚀时间对水下射流性能的影响关系，较全面地揭示了水下射流的特性。

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Underwater photography presents unique challenges due to the properties of water and its effect on light.

水下摄影特有的挑战就是针对水本身的性质给光线造成的影响。

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