slope sliding failure

例句：

1. 1. The car is drivingdown the hill at a steep slope.
   汽车正沿着陡峭的山坡向下行驶。
2. 2. Theslope of the road is too steep forcars to drive on.
   这条路的坡度太陡，不适合汽车行驶。
3. 3. The slopeof the mountain is changing as the weatherchanges.
   随着天气的变化，这座山的坡度也在变化。