He showed how it travels in a straight line, how it bounces off of different surfaces in different ways, how it makes an image in the eye hundreds of years before thinkers in Europe refigured those things out.
他展示了它是如何沿直线传播的，它是如何以不同的方式在不同的表面上反射的，它是如何在眼睛里成像的，这比欧洲思想家重新理解这些东西还早了几百年。