1
- the joint between the thigh and the lower leg in humans（人的）膝关节, 膝盖。
1.1
- the corresponding or analogous joint in other animals（动物的）膝关节。
1.2
- the upper surface of someone's thigh when they are sitting; a person's lap（人坐着时的）大腿上面：
they were eating their suppers on their knees.
他们正坐着以大腿面作餐桌吃晚饭。
1.3
- the part of a garment covering the knee（衣物的）膝部, 下摆。
1.4
- an angled piece of wood or metal frame used to connect and support the beams and timbers of a wooden ship（木船上的）肘板, 肘材。
1.5
- an abrupt obtuse or approximately right-angled bend in a graph between parts where the slope varies smoothly曲线图的弯曲处, 拐点。
(knees, kneed, kneeing)with obj.
- hit (someone) with one's knee用膝盖撞击：
she kneed him in the groin.
她用膝盖撞击他的裆部。
短语
at one's mother's（或father's）knee
- at an early age儿时。
bend（或bow）the（或 one's） knee (to)
- kneel in submission; submit下跪, 屈服。
bring someone/thing to their/its knees
- reduce someone or something to a state of weakness or submission迫使某人屈从; 使某事物处于被控制地位。
fall （或drop, 或sink, 等） to one's knees
- assume a kneeling position下跪, 跪下。
on bended knee( s)
- kneeling, especially in entreaty or worship（尤指乞求或崇拜时）跪着：
did your guy propose on bended knee?
你男朋友是不是跪着向你求婚的？
on one's knees
1
- in a kneeling position跪着。
1.1
- figurative on the verge of collapse〈喻〉濒临崩溃：
when they took over, the newspaper was on its knees.
他们接手的时候, 报纸已经行将崩溃。
weak at the knees
- overcome by a strong feeling, typically desire被（强烈感情, 尤指欲望）屈服。
词源
Old English cnēow, cnēo, of Germanic origin; related to Dutch knie and German Knie, from an Indo-European root shared by Latin genu and Greek gonu.