Acquisition: The stage in a classical conditioning experiment during which the conditioned response is first elicited by the condtioned stimulus.
习得：在经典条件反射实验中，条件刺激最先引发条件反射的阶段。
Action Potential: The nerve impulse activated in a neuron that travels down the axon and causes neurotransmitters to be released into a synapse.
动作电位：神经冲动在神经元中被激活，沿着轴突向下传播，导致神经递质被释放到突触。
