We spent most of our time exploring the inner layer, which consists of the retina and its three kinds of neurons: photoreceptors, bipolar cells, and ganglion neurons.

我们花了大部分时间探索内层，它由视网膜和它的三种神经元组成：光感受器、双极细胞和神经节神经元。

That light hits your posterior retina and spreads from the photoreceptors to the bipolar cells just beneath them, to the innermost ganglion cells, where they then generate action potentials.

光线到达你的后视网膜，从光感受器扩散到它们下面的双极细胞，再扩散到最里面的神经节细胞，然后在那里它们产生动作电位。