Rather than raw electricity, these synapses use neurotransmitters, or chemical signals, that diffuse across a synaptic gap to deliver their message.

这些突触不使用原始电流，而是使用神经递质或化学信号，通过突触间隙扩散来传递信息。

And it's these neurotransmitters that act like couriers diffusing across the synaptic gap, and binding to receptor sites on the postsynaptic neuron.

正是这些神经递质像信使一样在突触间隙扩散，并与突触后神经元上的受体位点结合。

When that action potential races down the length of its axon to the terminal, the message hits the synapse that then flings it over that synaptic gap to another neuron that's in your spinal cord.

当动作电位沿着轴突的长度到达终末时，信息会击中突触，然后将其抛过突触间隙到脊髓中的另一个神经元。