1、knees英[ni?z]美[ni?z]，n.膝; 膝盖; 膝关节; (裤子的)膝部; (坐下时)大腿朝上的面;v.用膝盖顶(或撞);knee的第三人称单数和复数。
2、[例句]He went down on one knee and asked her to marry him.他单膝跪下向她求婚。