Maximum observed frequency in HF backscatter ionogram and day variblelaw of slopedistance.
高频返回散射电离图中最高观测频率、斜距的日变化规律；
2
This study analysed the processes of rainsplash erosion and introduced a conception of the effective slopedistance during rainsplash erosion.
通过对坡面雨滴溅蚀过程的分析．提出了雨滴溅蚀有效坡段的概念。
3
From the shore line, out a distance which may be anywhere from a few miles to a few hundred miles, runs the gentle slope of the continental shelf, geologically part of the continents.