knoll英 [nəʊl]美 [noʊl]n. 圆丘; 土墩复数:knolls 过去分词:knolled GREBNC.33458 / COCA.18672柯林斯词典N-COUNT; N-IN-NAMES 圆丘;土墩Aknollis a low hill with gentle slopes and a rounded top....a grassy knoll.长满草的圆丘...on Nibley Knoll.在尼布利小山上英英释义nouna small natural hillSynonym:moundhillockhummockhammock双语例句