slope instability的用法和樣例：
例句
- Groundwater is one of the main factors resulting in instability and sliding failure of the soil slope.
摘要地下水是導致土質(zhì)公路邊坡失穩滑動(dòng)破壞的主要原因之一。 - The combined effect of the tensile stress and seeped water is the direct cause of dilapidation of this silty clay slope.
張應力和水的共同作用，是導致了邊坡失穩的直接原因。
