knee-jerk reaction

短语

词形变化

knee-jerk reactions 复数 knee-jerk reactions

释义与例句

n.
  1. 1.

    An instantaneous reaction made without thought.

    习语

    Near-synonym: gut reaction

词源

By means of an elliptical reference to the reflexes of reflex arcs, in this case the patellar reflex.

来源：wiktionary