1、Presynaptic neurons release neurotransmitters into the synaptic cleft.
突触前神经元将神经递质释放到突触间隙中。

2、Presynaptic inhibition refers to the reduction of neurotransmitter release from the presynaptic neuron.
突触前抑制指的是减少突触前神经元释放神经递质的过程。