How we cite our quotes:
[Edward to Bella:] "Hello," said a quite musical voice. (2.109)
Bella is immediately attracted to Edward's voice. As Edward later points out, he's a perfect predator because everything about him is designed to draw her to him.
When he touched me, it stung my hand as if an electric current had passed through us. (2.128)
Bella feels electricity when Edward touches her. She and Edward clearly have some chemistry.
As always, I was electrically aware of Edward sitting close enough to touch, as distant as if he were merely an invention of my imagination. (4.24)
Bella is always physically aware of Edward, even when they are not touching.