knolls
n. 小圆丘,小土墩( knoll的名词复数 )
A knoll is a low hill with gentle slopes and a rounded top.
...a grassy knoll.
长满草的圆丘
...on Nibley Knoll.
在尼布利小山上
He carefully surveyed the ridges and knolls once more , and also the ravines and gullies.
他又注意地巡视着那些梁和峁, 还有沟和壑.