The other is that the volatility is assumed to be stochastic and the price of the underlying asset is a levy process, namely we can further promote the model on the basis of the first one.

假设波动率是随机的，且资产价格服从l evy过程，即在前述模型基础上作了进一步推广。

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Tranexamic acid, explains Jerrold Levy of Emory University, in a comment piece accompanying the paper, interferes with the process of fibrinolysis, the breakdown of clots.

美国艾莫利大学的杰罗尔德 列维在该论文的补充解释中说，氨甲芳酸干扰了纤维蛋白溶解过程，即血块的溶解。

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That process may have started inadvertently in 1956 when the British administration of the Gilbert Islands in Micronesia put a levy on the export of phosphates-bird manure-used in fertiliser.

这个过程在1956年本来可以自然开始的，那时在位于密克罗尼西亚的吉尔伯特群岛上英国管理部门对出口用作肥料的磷酸盐-鸟的粪肥-强制增税。

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The cool thing about it is the CEO, Arik Levy, created the tracking process, himself, with the help of an internal IT guy.

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He said Holyrood could put a levy on the water used in the distilling process, a suggestion backed by another former economic advisor to the government, Sir George Mathewson.

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However, the British Retail Consortium, who were also consulted as part of the committee's evidence-gathering process, said it was opposed to a levy.

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