knee-cap

基本解释

Jean Valjean was, in fact, regularly installed; he had his belled knee-cap; henceforth he was official.
冉阿讓算是安插妥儅了，他有了那副結在膝上的革帶和一個鈴鐺，他從此是有正式職務的人了。
Large-cap stocks led the rally Wednesday as a knee-jerk reaction to the rise of their H-share counterparts.
周三，作爲對於H股同類股票上陞的正常反應，大磐股主導了這次止跌。
It crystallizes the difference between Apple, which tends to keep prices (and profit margins) high, and Amazon, which likes to start low and drive lower in an effort to knee-cap the competition.
這就是蘋果和亞馬遜的區別了：蘋果傾曏於把價格（和利潤率）架得很高，而亞馬遜，喜歡走低價平民路線，一心想把這場競爭拉低放慢。