【医】 膝反射
在线英汉词典

knee-jerk的短语、例句：

knee-jerk n 1 involuntary jerk of the leg when a tendon below the knee is struck 膝反射. 2 [attrib 作定语] (fig derog 比喻, 贬) done or produced automaticallyand without thought 自动的; 不经思考而做的
a knee-jerk reaction to the mention of Communism 一提共产主义就不加思索做出的反应.