n.膝( knee的名词复数 )；膝盖；（裤子的）膝部；坐下时)大腿朝上的面 双语释义：n.(名词)[C]膝,膝盖,膝部 joint between the thigh and lower part of the human leg; corresponding joint in animals; part of a garment covering the knee英英释义： kneen.hinge joint in the human leg connecting the tibia and fibu