We two countries know each other through each other's and not through our neighbour's optic.我们两国是通过彼此双方的而不是通过邻国的眼睛来互相了解的。The optic nerve in the eye allows you to see.眼睛里的视神经让人能看见。The reason for this is that the optic nerve is a part of the brain.这其中的原因在于视神经是大脑的一部分。