两个都可以,后一个好一些,都有山区的意思,前者一般用于指某个地方,比如,Xuedou Mountain Scenic Area 雪窦山风景区Rooster Mountain Scenic Area 鸡公山风景区后者,是一般意义上的山区,比如,The south of Jinan is a mountainous area, which means that the application of gravity retaining wall is very common. The thesis may offer some help to the designs of large retaining walls.济南南部为山区,重力式挡土墙应用非常广泛,本文对于高大挡土墙设计具有一定的借鉴作用。