Bella Swan: You nicknamed my daughter after the Loch Ness Monster?
Garrett: I hated the first British invasion. I hate the second one even more.
Emmett Cullen: Even The Beatles? Really, Garrett?
Garrett: Old habits die hard.
Edward Cullen: This is our room.
Bella Cullen: [Seeing the bed.] Vampires don't sleep.
Edward Cullen: It's not intended for sleep.
Bella Cullen: What was that?
Edward Cullen: She showed you the first memory she has of you.
Bella Cullen: Showed me how?
Edward Cullen: How do I hear thoughts? How does Alice see the future? She's gifted.
Jacob Black: Lot of red eyes around here.
Bella Cullen: I thought we would be safe forever. But "forever" isn't as long as I'd hoped.
Bella Cullen: Now you know. Nobody's ever loved anybody as much as I love you.
Edward Cullen: There's one exception.
Answer: Aro also makes the argument that for the first time in our history humans pose a threat to our kind with their weapons that can destroy us. Theoretically any weapons that can tear apart and/or burn the vampires would work. So, yes, things other than vampires and werewolves can kill the vampires and werewolves.