natural elevation
美
英 
例句
A natural elevation of the earth's surface having considerable mass, generally steep sides, and a height greater than that of a hill.
山自然形成的高出于地面的一塊高地,占地廣大,通常外側(cè)陡峻且比丘陵要高。
A well-defined natural elevation smaller than a mountain.
陸地上局部的天然高地,有明顯輪廓,略小于大山。