n (1)膝(joint at the bend of the leg)[C]：a～joint 膝关节;fall down and cut one's～摔倒伤了自己的膝盖;sit on sb's～坐在某人膝上;bend one's～s to sit down 弯膝坐下;be on one's～weeding the garden 跪在花园里除草;

(2)裤子的膝盖部位(part of an article of clothing covering the knee) [C]： a hole in the～of sb's trousers 某人裤子膝盖处的洞;The～s of his overalls/trousers were patched. 他的马裤/裤子的膝盖处打了补丁。

be/go(down)on one's knees 1) 跪着 (下)：He went down on one～before her.他在她面前单腿跪下。2)哀求：The boys were on their～s for hours before their parents agreed to their camping plans. 孩子们乞求了数小时之后，他们的父母才同意他们的野营计划。

bring sb to his knees 迫使屈服： Nothing could bring them to their～s.什么也不能使他们屈服。

vt 用膝盖碰 (撞，击) (hit，push or strike with the knee)[T+n，T+n+prep，C+n+adj]：～sb in the back/the groin/the stomach 用膝盖撞击某人的背/腹股沟/腹部;～the door open 用膝盖把门撞开;

→′knee-breeches n(齐膝或刚过膝的)短裤;′kneecap n 膝盖骨;护膝;knee-′deep adj 齐膝深的;knee-′high adj 齐膝高的;′knee-jerk n 膝反射;自动反应;adj 做出自动反应的;′knee-length adj 长到膝盖的