如果他的理论正确，通过变包装的内层成分来控制令人不悦化学物质浓度，对于葡萄酒业而言是一个好方法。

If his theory is correct, fiddling with the composition of box interiors could be a good way for the wine industry to control the concentration of unpleasant chemicals.

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本文叙述了与钠净化技术有关的内容，包括钠中杂质浓度、净化理论、冷阱效率和冷阱再生等问题。

The content related to purification technique for sodium is discussed. It includes impurity concentration, purification theory, clod trap, efficiency, regeneration and so on.

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然后基于半导体的速率方程理论，建立了载流子浓度随时间变化的数学模型。

Secondly, mathematical model of time-resolved carrier density has been established on the base of semiconductor rate equation theory.

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