How we cite our quotes:
It was there, sitting in the lunchroom, trying to make conversation with seven curious strangers, that I first saw them.
They were sitting in the corner of the cafeteria, as far away from where I sat as possible in the long room. There were five of them. They weren't talking, and they weren't eating, though they each had a tray of untouched food in front of them. (1.107-108)
Upon first sight of the Cullens, Bella is mesmerized. They are beautiful beyond belief. But aside from their good looks, they also appear different in another way – they aren't eating or talking.
I stared because their faces, so different, so similar, were all devastatingly, inhumanly beautiful. They were faces you never expected to see except perhaps on the airbrushed pages of a fashion magazine. Or painted by an old master as the face of an angel. It was hard to decide who was the most beautiful – maybe the perfect blond girl, or the bronze-haired boy (1.113)
Bella notices just how gorgeous the Cullen family is. And she's right – their good looks are "inhuman." Also notice how Bella, for whatever reason, is immediately more attracted to Edward ("the bronze-haired boy") than to Jasper or Emmett.
In fact, I was sure there was something different. I vividly remembered the flat black color of his eyes the last time he glared at me – the color was striking against the background of his pale skin and his auburn hair. Today, his eyes were a completely different color: a strange ocher, darker than butterscotch, but with the same golden tone. (2.145)
Bella is very observant – or at least observant when it comes to Edward. She notices Edward's eyes change color between black and ocher. We later learn that vampires' eye color changes depending on whether or not they're thirsty. Their eyes are black when they haven't fed recently, so now that Edward's eyes are lighter, he's less dangerous to Bella.