excurvature

例句：

1. 1. The curve of the road is quitesharp.
   这条路的曲线相当陡峭。
2. 2. The curvein the river is due to theerosion of the land.
   河流中的弯曲是由于土地侵蚀造成的。
3. 3. The curve of themountain is breathtaking.
   这座山的曲线令人叹为观止。