Variations in the composition of the planets are largely responsible for the density differences.
行星构成成分的不同是造成密度差异的主要原因。
The bridge was actuated by sinusoid sweeping frequency wave, and then the power spectral density differences between the undamaged and damaged bridge were analyzed.
利用正弦扫频波激振钢桥，分析其损伤前后加速度反应功率谱密度的变化。
The computation results showed that the effect of density differences when velocity of flow was small was obvious to the boundary of laminar flow in the elevation difference pipeline.
结果表明，在大落差管道，流速不大的情况下，密度差对层流边界层影响比较明显。
Velocity and salinity(or density) differences between the wake area and non-wake area of a surface ship may be measured with an electric conductivity probe.
在舰船尾流区与非尾流区之间存在显著的速度差和盐度（或密度）差，利用电导率探头可获得对应于这些差别的尾流电导率信号。
Velocity and salinity(or density) differences between the wake area and non-wake area of a surface ship may be measured with an electric conductivity probe.
在舰船尾流区与非尾流区之间存在显著的速度差和盐度（或密度）差，利用电导率探头可获得对应于这些差别的尾流电导率信号。
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