Naturalroad building materials have a close relation to the engineering quality and cost, and the changing of geologic conditions may cause some design modifications.
天然筑路材料与工程质量及造价有着密切关系，变更设计中有些是由于地质条件的变化而引起的。
2
The road follows the natural contours of the coastline.
这条路沿着海岸线的自然轮廓延伸。
《牛津词典》
3
Tim had walked into the shade of the maple. Into the jungle of weeds that formed a natural fence along the road.