Cách sử dụng
The word 'knee' refers to a joint in your leg that helps you walk, run, and move around. You use your knees to bend your legs and sit down or pick something up off the ground. You may also bump your knee against a table or accidentally hurt your knee while playing sports. It is important to take care of your knees and protect them from injuries. In daily life, you may hear people use the phrase "a knee-jerk reaction" which means an automatic or quick response to something without taking time to think about it.