The reason for the improvement of precision by the EP is the change of double layer capacity value.

通过界面双电层电容值的变化来解释脉冲电化学光整加工提高精度的根本原因；

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With DivX 7, users can compress a full two-hour HD film to around 8 GB in size, or just short of the storage capacity of one double-layer DVD.

Divx7可以把两小时时长的影片压缩至8GB左右的容量，正好可以放在一张双层DVD光盘中.

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Using double layer container transport is an effective approach to reduce intense transport capacity of main railway line in China and decrease container transport cost.

采用双层集装箱运输是缓解目前我国铁路主要干线运输能力紧张状况、降低集装箱运输成本的有效途径。

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