1.

1. 小山：oligopoly 求过于供的市场情况 | knoll 小山 | central element 中心元件

2. 圆丘：knoll reef 圆丘礁 | knoll 圆丘 | Knoop microhardness test 克诺普微硬度试验

3. 圆丘;海底小丘(通常坡度很陡：knocking 爆震声 | knoll 圆丘;海底小丘(通常坡度很陡 | knoll 圆丘海底小丘(通常坡度很陡

4. 丘：小丘 knob | 丘 knoll | 结点 knot

1. 圆丘；土墩
    A knoll is a low hill with gentle slopes and a rounded top.

    e.g. ...a grassy knoll.
           长满草的圆丘
    e.g. ...on Nibley Knoll.
           在尼布利小山上

1. a small natural hill

    Synonym: moundhillockhummockhammock