求翻译：膝跳反射是一种最为简单的反射类型，它仅包含两个神经元，(神经调节的基本单位，由反射弧构成，又包括感受器，传入神经，中枢神经，传出神经，效应器）感觉神经元（输入）和运动神经元（输出）。是什么意思？

The knee-jerk reflex is one of the most simple type of reflection, it contains only two neurons (neural regulation of the basic unit, composed of reflex arc, but also includes the receptors, afferent nerves, central nervous system, efferent, effector) sensory neurons (input) and motor neuron (output

Knee skip reflex is one of the most simple of the reflective type, it only contains two neurons (nerve, adjust the basic units, by reflection, and the inclusion of one receptor, the incoming nerve, central nervous system and the nerves, and effectors), my nerves (input) and movement neurons (output)

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