Based on the saturated porous medium's theory, the inertia force of both the soil and the water is considered; the stable vibration problem of transversely isotropic saturated soils is studied.

基于饱和地基多孔介质理论，考虑了水土的惯性及耦合作用，研究了横观各向同性饱和地基的稳态振动问题。

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The isolation cones placed strategically in a tripod pattern at the bottom corners of the sound system reduce the vibration frequencies and provide the most stable supporting structure regardless of the surface on which it rests.

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"Underground, everything is much more stable, " says Zhao, referring to factors such as temperature, humidity and vibration.

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