Both oil and gas are less dense than water, so they generally tend to rise upward through water-saturated rock and sediment.
石油和天然气的密度都比水小，所以二者通常会浮在被水浸泡的岩石和沉积物的表层。
Mudslides develop when water rapidly accumulates in the ground and results in a surge of water-saturated rock, earth, and debris.
当雨水迅速累积在土地上并且产生了大量被水浸透的岩石，泥土与碎屑时，泥石流就形成了。
The saturated rock is taken as a solid-liquid two-phase medium. Perturbation method is used to analyze the stability conditions.
将饱和岩石视为固液两相介质，用小扰动方法进行稳定性分析。
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