gradient within the switching area

例句：

1. 1.The slope of the hill is steep.
   这座山的坡度很陡。
2. 2. The incline of the road is too steep for me to walk.
   这条路的倾斜度对我来说太高，我走不动。
3. 3.The gradient of the river changes as it flows through the valley.
   这条河在流过山谷时，其流速的变化很大。