为了计算这个，需要知道密度。

Of course, to compute this,you need to know the density.

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由此，我计算出了该汽泡纸的密度为0.017克/立方厘米。

From this, I get a bubble wrap density of 0.017 g/cm3.

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电荷重心和电荷密度可通过计算得出。

The mean charge depth and the charge density can be calculated.

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一般来说，在仪器开始运行时，进行进样精密度实验，计算其相对标准偏差。

The RSD is normally performed at the beginning of the run.

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设计和计算时需考虑蒸汽密度的变化。

The variation of steam density due to large pressure drop should be taken into account.

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设计和计算时需考虑蒸汽密度的变化。

The variation of steam density due to large pressure drop should be taken into account.

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