When these vesicles dump their contents into the synaptic cleft, the concentration of these ligands rise.

当这些小泡将其内含物释放入突触间隙,这些配体的浓度即增加

耶鲁公开课 - 生物医学工程探索课程节选

It's called the synaptic cleft and it's filled with extracellular fluid.

这一空间叫做突触间隙,中间充满了细胞外液

耶鲁公开课 - 生物医学工程探索课程节选

When an action potential comes down this pre-synaptic axon, when it reaches this point here, it sets off the process of these vesicles dumping their content into the synaptic cleft.

当动作电位到达轴突的突触前膜时,当到达这一点时 小泡就将其内含物,排放到突触间隙中去

耶鲁公开课 - 生物医学工程探索课程节选