Could you have a look at this "across the street" and "down the street" in the context below. What do they mean here? I can not recognize the difference between them, although I have looked them up in the dictionary.
Thanks a million !
Professor: Simply put, perspective allows us to differentiate between objects of different sizes and at different distances from the viewer. It enables us to see immediately what the relationships are. The fundamental principle is that objects appear smaller as their distance from the observer increase. For instance, someone across the street appears smaller than the person standing next to you. Someone down the street looks even smaller, someone farther away looks smaller still, and so on. Think of buildings in a landscape ... the cross-ties of railroad tracks ... the cars on a train. These are just a few things we know are approximately equal in size, yet seem to diminish with distance because of perspective.