motor defensive conditioned reaction

例句：

1. 1.The car's engine is a motordefensive conditioned reaction to the road bumps.
   汽车的引擎是对路面颠簸的一种动力防御条件反射。
2. 2. The dog's barking is a motor defensive conditioned reactionto strangers.
   狗的吠叫是对陌生人的一种动力防御条件反射。
3. 3. The child's laughter is a motor defensive conditionedreaction to joy.
   孩子的笑声是对快乐的一种动力防御条件反射。