instable slope

例句：

1. 1. The instabilityof the slope caused the landslide.
   斜坡的不稳定导致了山体滑坡。
2. 2. The constructioncrew had to make adjustments to theslope to prevent further damage.
   施工队不得不调整斜坡，以防止进一步的损害。
3. 3. Theslope was too steep for vehicles to safelynavigate.
   斜坡太陡，车辆无法安全通行。