把这一句，留给此刻的你
I became startled by the extraordinary difference between something whose surface is completely invisible which only makes itself present by virtue of what it reflects, and a window, which doesn't make itself apparent at all, in the ideal case.
令我吃惊的是，在理想情况下，一个物体的表面是完全看不见的，只能通过它所反射的东西呈现出来，而另一个物体的窗户则完全看不见。